diff --git a/models-built/classify.js b/models-built/classify.js
new file mode 100644
index 0000000..86a3573
--- /dev/null
+++ b/models-built/classify.js
@@ -0,0 +1,68 @@
+"use strict";
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+exports.__esModule = true;
+var TypeORM = require("typeorm");
+var common_1 = require("./common");
+var Classify = /** @class */ (function (_super) {
+    __extends(Classify, _super);
+    function Classify() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Classify.cache = true;
+    __decorate([
+        TypeORM.PrimaryGeneratedColumn(),
+        __metadata("design:type", Number)
+    ], Classify.prototype, "id");
+    __decorate([
+        TypeORM.Index({ unique: true }),
+        TypeORM.Column({ unique: true, nullable: true, type: "varchar", length: 20 }),
+        __metadata("design:type", String)
+    ], Classify.prototype, "name");
+    __decorate([
+        TypeORM.Column({ nullable: true, type: "varchar", length: 100 }),
+        __metadata("design:type", String)
+    ], Classify.prototype, "intro");
+    __decorate([
+        TypeORM.Column({ type: "integer" }),
+        __metadata("design:type", Number)
+    ], Classify.prototype, "problem_num");
+    __decorate([
+        TypeORM.Column({ type: "integer" }),
+        __metadata("design:type", Number)
+    ], Classify.prototype, "order");
+    __decorate([
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], Classify.prototype, "update_time");
+    __decorate([
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], Classify.prototype, "create_time");
+    Classify = __decorate([
+        TypeORM.Entity()
+    ], Classify);
+    return Classify;
+}(common_1["default"]));
+exports["default"] = Classify;
+//# sourceMappingURL=classify.js.map
\ No newline at end of file
diff --git a/models-built/classify.js.map b/models-built/classify.js.map
new file mode 100644
index 0000000..5dbe64d
--- /dev/null
+++ b/models-built/classify.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"classify.js","sourceRoot":"","sources":["../models/classify.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;AAAA,iCAAmC;AACnC,mCAA6B;AAM7B;IAAsC,4BAAK;IAA3C;;IAwBA,CAAC;IAvBU,cAAK,GAAG,IAAI,CAAC;IAGpB;QADC,OAAO,CAAC,sBAAsB,EAAE;;gCACtB;IAIX;QAFC,OAAO,CAAC,KAAK,CAAC,EAAE,MAAM,EAAE,IAAI,EAAE,CAAC;QAC/B,OAAO,CAAC,MAAM,CAAC,EAAE,MAAM,EAAE,IAAI,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,MAAM,EAAE,EAAE,EAAE,CAAC;;kCACjE;IAGb;QADC,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,MAAM,EAAE,GAAG,EAAE,CAAC;;mCACnD;IAGd;QADC,OAAO,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;yCAChB;IAGpB;QADC,OAAO,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;mCACtB;IAGd;QADC,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;yCAChC;IAGpB;QADC,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;yCAChC;IAvBH,QAAQ;QAD5B,OAAO,CAAC,MAAM,EAAE;OACI,QAAQ,CAwB5B;IAAD,eAAC;CAAA,AAxBD,CAAsC,mBAAK,GAwB1C;qBAxBoB,QAAQ"}
\ No newline at end of file
diff --git a/models-built/classify_to_problem.js b/models-built/classify_to_problem.js
new file mode 100644
index 0000000..5bf1ffd
--- /dev/null
+++ b/models-built/classify_to_problem.js
@@ -0,0 +1,53 @@
+"use strict";
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+exports.__esModule = true;
+var TypeORM = require("typeorm");
+var common_1 = require("./common");
+var ClassifyToProblem = /** @class */ (function (_super) {
+    __extends(ClassifyToProblem, _super);
+    function ClassifyToProblem() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    ClassifyToProblem.cache = true;
+    __decorate([
+        TypeORM.PrimaryGeneratedColumn(),
+        __metadata("design:type", Number)
+    ], ClassifyToProblem.prototype, "id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], ClassifyToProblem.prototype, "c_id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], ClassifyToProblem.prototype, "p_id");
+    ClassifyToProblem = __decorate([
+        TypeORM.Entity()
+    ], ClassifyToProblem);
+    return ClassifyToProblem;
+}(common_1["default"]));
+exports["default"] = ClassifyToProblem;
+//# sourceMappingURL=classify_to_problem.js.map
\ No newline at end of file
diff --git a/models-built/classify_to_problem.js.map b/models-built/classify_to_problem.js.map
new file mode 100644
index 0000000..319aeb7
--- /dev/null
+++ b/models-built/classify_to_problem.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"classify_to_problem.js","sourceRoot":"","sources":["../models/classify_to_problem.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;AAAA,iCAAmC;AACnC,mCAA6B;AAG7B;IAA+C,qCAAK;IAApD;;IAaA,CAAC;IAZU,uBAAK,GAAG,IAAI,CAAC;IAGpB;QADC,OAAO,CAAC,sBAAsB,EAAE;;yCACtB;IAIX;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;2CACvC;IAIb;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;2CACvC;IAZI,iBAAiB;QADrC,OAAO,CAAC,MAAM,EAAE;OACI,iBAAiB,CAarC;IAAD,wBAAC;CAAA,AAbD,CAA+C,mBAAK,GAanD;qBAboB,iBAAiB"}
\ No newline at end of file
diff --git a/models-built/common.js b/models-built/common.js
index 5c4c690..ec82603 100644
--- a/models-built/common.js
+++ b/models-built/common.js
@@ -178,18 +178,17 @@ var Model = /** @class */ (function (_super) {
     };
     Model.countQuery = function (query) {
         return __awaiter(this, void 0, void 0, function () {
-            var parameters, _a;
-            var _b;
+            var _a, parameters, _b;
             return __generator(this, function (_c) {
                 switch (_c.label) {
                     case 0:
                         parameters = null;
                         if (typeof query !== 'string') {
-                            _b = query.getQueryAndParameters(), query = _b[0], parameters = _b[1];
+                            _a = query.getQueryAndParameters(), query = _a[0], parameters = _a[1];
                         }
-                        _a = parseInt;
+                        _b = parseInt;
                         return [4 /*yield*/, TypeORM.getManager().query("SELECT COUNT(*) FROM (" + query + ") AS `__tmp_table`", parameters)];
-                    case 1: return [2 /*return*/, _a.apply(void 0, [(_c.sent())[0]['COUNT(*)']])];
+                    case 1: return [2 /*return*/, _b.apply(void 0, [(_c.sent())[0]['COUNT(*)']])];
                 }
             });
         });
@@ -219,6 +218,26 @@ var Model = /** @class */ (function (_super) {
             });
         });
     };
+    Model.querySomeColumn = function (queryBuilder) {
+        return __awaiter(this, void 0, void 0, function () {
+            return __generator(this, function (_a) {
+                switch (_a.label) {
+                    case 0: return [4 /*yield*/, queryBuilder.select('id').addSelect('title').getRawMany()];
+                    case 1: return [2 /*return*/, _a.sent()];
+                }
+            });
+        });
+    };
+    Model.updateColumnById = function (queryBuilder, updateObj, id) {
+        return __awaiter(this, void 0, void 0, function () {
+            return __generator(this, function (_a) {
+                switch (_a.label) {
+                    case 0: return [4 /*yield*/, queryBuilder.set(updateObj).where("id = :id", { id: id }).execute()];
+                    case 1: return [2 /*return*/, _a.sent()];
+                }
+            });
+        });
+    };
     Model.queryPage = function (paginater, where, order, largeData) {
         if (largeData === void 0) { largeData = false; }
         return __awaiter(this, void 0, void 0, function () {
@@ -346,6 +365,17 @@ var Model = /** @class */ (function (_super) {
             });
         });
     };
+    Model.queryBy = function (where) {
+        return __awaiter(this, void 0, void 0, function () {
+            var queryBuilder;
+            return __generator(this, function (_a) {
+                queryBuilder = where instanceof TypeORM.SelectQueryBuilder
+                    ? where
+                    : this.createQueryBuilder().where(where);
+                return [2 /*return*/, queryBuilder.getMany()];
+            });
+        });
+    };
     Model.cache = false;
     return Model;
 }(TypeORM.BaseEntity));
diff --git a/models-built/common.js.map b/models-built/common.js.map
index 3e36df6..60236a9 100644
--- a/models-built/common.js.map
+++ b/models-built/common.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/models-built/problem.js b/models-built/problem.js
index 637edcb..420c56c 100644
--- a/models-built/problem.js
+++ b/models-built/problem.js
@@ -566,18 +566,17 @@ var Problem = /** @class */ (function (_super) {
                                         if (this.type === ProblemType.SubmitAnswer && statisticsCodeOnly.includes(type))
                                             return [2 /*return*/];
                                         return [4 /*yield*/, syzoj.utils.lock(['Problem::UpdateStatistics', this.id, type], function () { return __awaiter(_this, void 0, void 0, function () {
-                                                var _a, column, order, result, resultRow, toDelete, baseColumns, record;
-                                                var _b;
+                                                var _a, _b, column, order, result, resultRow, toDelete, baseColumns, record;
                                                 return __generator(this, function (_c) {
                                                     switch (_c.label) {
                                                         case 0:
-                                                            _a = statisticsTypes[type], column = _a[0], order = _a[1];
+                                                            _b = statisticsTypes[type], column = _b[0], order = _b[1];
                                                             return [4 /*yield*/, judge_state_1["default"].createQueryBuilder()
                                                                     .select([column, "id"])
                                                                     .where("user_id = :user_id", { user_id: user_id })
                                                                     .andWhere("status = :status", { status: "Accepted" })
                                                                     .andWhere("problem_id = :problem_id", { problem_id: this.id })
-                                                                    .orderBy((_b = {}, _b[column] = order, _b))
+                                                                    .orderBy((_a = {}, _a[column] = order, _a))
                                                                     .take(1)
                                                                     .getRawMany()];
                                                         case 1:
diff --git a/models-built/problem.js.map b/models-built/problem.js.map
index fada6a4..923700a 100644
--- a/models-built/problem.js.map
+++ b/models-built/problem.js.map
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/models-built/user.js b/models-built/user.js
index c8713fd..24ec427 100644
--- a/models-built/user.js
+++ b/models-built/user.js
@@ -385,6 +385,11 @@ var User = /** @class */ (function (_super) {
         TypeORM.Column({ nullable: true, type: "integer" }),
         __metadata("design:type", Number)
     ], User.prototype, "ac_num");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], User.prototype, "current_p_id");
     __decorate([
         TypeORM.Index(),
         TypeORM.Column({ nullable: true, type: "integer" }),
diff --git a/models-built/user.js.map b/models-built/user.js.map
index 6eea32f..a5403cd 100644
--- a/models-built/user.js.map
+++ b/models-built/user.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/models-built/user_to_practice.js b/models-built/user_to_practice.js
new file mode 100644
index 0000000..c9a949d
--- /dev/null
+++ b/models-built/user_to_practice.js
@@ -0,0 +1,73 @@
+"use strict";
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+exports.__esModule = true;
+var TypeORM = require("typeorm");
+var common_1 = require("./common");
+var UserToPractice = /** @class */ (function (_super) {
+    __extends(UserToPractice, _super);
+    function UserToPractice() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    UserToPractice.cache = true;
+    __decorate([
+        TypeORM.PrimaryGeneratedColumn(),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "u_id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "c_id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ nullable: true, type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "p_id");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "is_practice");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "is_finished");
+    __decorate([
+        TypeORM.Index(),
+        TypeORM.Column({ type: "integer" }),
+        __metadata("design:type", Number)
+    ], UserToPractice.prototype, "practice_num");
+    UserToPractice = __decorate([
+        TypeORM.Entity()
+    ], UserToPractice);
+    return UserToPractice;
+}(common_1["default"]));
+exports["default"] = UserToPractice;
+//# sourceMappingURL=user_to_practice.js.map
\ No newline at end of file
diff --git a/models-built/user_to_practice.js.map b/models-built/user_to_practice.js.map
new file mode 100644
index 0000000..5344603
--- /dev/null
+++ b/models-built/user_to_practice.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"user_to_practice.js","sourceRoot":"","sources":["../models/user_to_practice.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;AAAA,iCAAmC;AACnC,mCAA6B;AAG7B;IAA4C,kCAAK;IAAjD;;IA6BA,CAAC;IA5BU,oBAAK,GAAG,IAAI,CAAC;IAGpB;QADC,OAAO,CAAC,sBAAsB,EAAE;;sCACtB;IAIX;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;wCACvC;IAIb;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;wCACvC;IAIb;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,QAAQ,EAAE,IAAI,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;wCACvC;IAIb;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;+CAChB;IAIpB;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;+CAChB;IAIpB;QAFC,OAAO,CAAC,KAAK,EAAE;QACf,OAAO,CAAC,MAAM,CAAC,EAAE,IAAI,EAAE,SAAS,EAAE,CAAC;;gDACf;IA5BJ,cAAc;QADlC,OAAO,CAAC,MAAM,EAAE;OACI,cAAc,CA6BlC;IAAD,qBAAC;CAAA,AA7BD,CAA4C,mBAAK,GA6BhD;qBA7BoB,cAAc"}
\ No newline at end of file
diff --git a/models/classify.ts b/models/classify.ts
new file mode 100644
index 0000000..00517c6
--- /dev/null
+++ b/models/classify.ts
@@ -0,0 +1,32 @@
+import * as TypeORM from "typeorm";
+import Model from "./common";
+import JudgeState from "./judge_state";
+import Article from "./article";
+import UserPrivilege from "./user_privilege";
+
+@TypeORM.Entity()
+export default class Classify extends Model {
+    static cache = true;
+
+    @TypeORM.PrimaryGeneratedColumn()
+    id: number;
+
+    @TypeORM.Index({ unique: true })
+    @TypeORM.Column({ unique: true, nullable: true, type: "varchar", length: 20 })
+    name: string;
+
+    @TypeORM.Column({ nullable: true, type: "varchar", length: 100 })
+    intro: string;
+
+    @TypeORM.Column({ type: "integer" })
+    problem_num: number;
+
+    @TypeORM.Column({ type: "integer" })
+    order: number;
+
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    update_time: number;
+
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    create_time: number;
+}
diff --git a/models/classify_to_problem.ts b/models/classify_to_problem.ts
new file mode 100644
index 0000000..106bcd6
--- /dev/null
+++ b/models/classify_to_problem.ts
@@ -0,0 +1,18 @@
+import * as TypeORM from "typeorm";
+import Model from "./common";
+
+@TypeORM.Entity()
+export default class ClassifyToProblem extends Model {
+    static cache = true;
+
+    @TypeORM.PrimaryGeneratedColumn()
+    id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    c_id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    p_id: number;
+}
diff --git a/models/common.ts b/models/common.ts
index 5a1dc7a..112e23b 100644
--- a/models/common.ts
+++ b/models/common.ts
@@ -119,6 +119,15 @@ export default class Model extends TypeORM.BaseEntity {
     return await queryBuilder.getMany();
   }
 
+
+  static async querySomeColumn(queryBuilder) {
+      return await queryBuilder.select('id').addSelect('title').getRawMany();
+  }
+
+    static async updateColumnById(queryBuilder, updateObj: object, id:number) {
+        return await queryBuilder.set(updateObj).where("id = :id", { id }).execute();
+    }
+
   static async queryPage(paginater: Paginater, where, order, largeData = false) {
     if (!paginater.pageCnt) return [];
 
@@ -208,4 +217,13 @@ export default class Model extends TypeORM.BaseEntity {
 
     return queryBuilder.getMany();
   }
+
+  static async queryBy(where) {
+      const queryBuilder = where instanceof TypeORM.SelectQueryBuilder
+          ? where
+          : this.createQueryBuilder().where(where);
+
+      return queryBuilder.getMany();
+  }
+
 }
diff --git a/models/user.ts b/models/user.ts
index ab7ef87..7f340d0 100644
--- a/models/user.ts
+++ b/models/user.ts
@@ -37,6 +37,10 @@ export default class User extends Model {
   @TypeORM.Column({ nullable: true, type: "integer" })
   ac_num: number;
 
+  @TypeORM.Index()
+  @TypeORM.Column({ nullable: true, type: "integer" })
+  current_p_id: number;
+
   @TypeORM.Index()
   @TypeORM.Column({ nullable: true, type: "integer" })
   submit_num: number;
diff --git a/models/user_to_practice.ts b/models/user_to_practice.ts
new file mode 100644
index 0000000..b36ae0a
--- /dev/null
+++ b/models/user_to_practice.ts
@@ -0,0 +1,34 @@
+import * as TypeORM from "typeorm";
+import Model from "./common";
+
+@TypeORM.Entity()
+export default class UserToPractice extends Model {
+    static cache = true;
+
+    @TypeORM.PrimaryGeneratedColumn()
+    id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    u_id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    c_id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ nullable: true, type: "integer" })
+    p_id: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ type: "integer" })
+    is_practice: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ type: "integer" })
+    is_finished: number;
+
+    @TypeORM.Index()
+    @TypeORM.Column({ type: "integer" })
+    practice_num: number;
+}
diff --git a/modules/admin.js b/modules/admin.js
index 1e930cb..24eebad 100644
--- a/modules/admin.js
+++ b/modules/admin.js
@@ -291,6 +291,22 @@ app.get('/admin/rejudge', async (req, res) => {
   }
 });
 
+app.get('/admin/classify', async (req, res) => {
+  try {
+    if (!res.locals.user || !res.locals.user.is_admin) throw new ErrorMessage('您没有权限进行此操作。');
+    
+    res.render('admin_classify', {
+      form: {},
+      count: null
+    });
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    })
+  }
+});
+
 app.post('/admin/other', async (req, res) => {
   try {
     if (!res.locals.user || !res.locals.user.is_admin) throw new ErrorMessage('您没有权限进行此操作。');
diff --git a/modules/practice.js b/modules/practice.js
new file mode 100644
index 0000000..a07b8a7
--- /dev/null
+++ b/modules/practice.js
@@ -0,0 +1,366 @@
+let Classify = syzoj.model('classify');
+let Problem = syzoj.model('problem');
+let CToP = syzoj.model('classify_to_problem');
+let Article = syzoj.model('article');
+let User = syzoj.model('user');
+let UToP = syzoj.model('user_to_practice');
+
+app.get('/practice', async (req, res) => {
+  if (!res.locals.user) {
+    res.render('error', {
+      err: new ErrorMessage('请先登录。')
+    });
+  } else {
+    async function getUserInfo(userId) {
+      let userQuery = await User.createQueryBuilder();
+      const currentUserInfo = await userQuery.where("id = :id", { id: userId }).getOne();
+      return currentUserInfo.current_p_id;
+    }
+    try {
+      let classifyQuery = Classify.createQueryBuilder();
+      let utopQuery = UToP.createQueryBuilder();
+      let result = await Classify.queryAll(classifyQuery);
+      let userQuery = await User.createQueryBuilder();
+      const userId = res.locals.user.id;
+      let currentPId = await getUserInfo(userId);
+      const unFinishedIdArray = [];
+      if (!currentPId) {
+        // 用户第一次进入练习板块
+        await userQuery.update(User).set({current_p_id: 1}).where("id = :id", { id:userId }).execute();
+      } else {
+        await result.forEachAsync(async resultItem => {
+          const c_id = resultItem.id;
+          let utopInfo = await utopQuery.where('c_id=:c_id',{c_id}).andWhere('u_id=:u_id',{u_id:userId}).andWhere("is_finished=1").getMany();
+          resultItem.ac_num = utopInfo.length || 0;
+          if (resultItem.ac_num === resultItem.problem_num) {
+            if (resultItem.order < result.length ) {
+              currentPId = resultItem.order + 1
+              await userQuery.update(User).set({current_p_id: currentPId}).where("id = :id", { id:userId }).execute();
+            }
+          } else {
+            test.push(resultItem.order);
+          }
+        });
+      }
+      if (unFinishedIdArray.length !== 0) {
+        const minOrder = Math.min.apply(null,unFinishedIdArray);
+        currentPId = minOrder;
+        await userQuery.update(User).set({current_p_id: minOrder}).where("id = :id", { id:userId }).execute();
+      }
+      result.sort(function(a,b) {
+        return a.order - b.order;
+      });
+      result.forEach(function(item) {
+        if (item.order <= currentPId) {
+          item.href = `/practice/classify/${item.id}`;
+        }
+        item.isNow = item.order === currentPId;
+      });
+      let userACArray = await utopQuery.where('u_id=:u_id',{u_id:userId}).andWhere("is_finished=1").getMany();
+      if (syzoj.config.practice_rating) {
+        const originRating = syzoj.config.default.user.rating;
+        const newRating = originRating + userACArray.length * syzoj.config.practice_rating;
+        await userQuery.update(User).set({rating: newRating}).where('id=:u_id',{u_id:userId}).execute();
+      }
+      res.render('practice', {
+        user:res.locals.user,
+        result,
+        newRating
+      })
+    } catch (e) {
+      syzoj.log(e);
+      res.render('error', {
+        err: e
+      });
+    }
+  }
+});
+
+app.get('/practice/classify/:cid/problem/:pid', async (req, res) => {
+  try {
+    let id = parseInt(req.params.pid);
+    let cid = parseInt(req.params.cid);
+    let problem = await Problem.findById(id);
+    if (!problem) throw new ErrorMessage('无此题目。');
+    
+    if (!await problem.isAllowedUseBy(res.locals.user)) {
+      throw new ErrorMessage('您没有权限进行此操作。');
+    }
+    
+    problem.allowedEdit = await problem.isAllowedEditBy(res.locals.user);
+    problem.allowedManage = await problem.isAllowedManageBy(res.locals.user);
+    
+    if (problem.is_public || problem.allowedEdit) {
+      await syzoj.utils.markdown(problem, ['description', 'input_format', 'output_format', 'example', 'limit_and_hint']);
+    } else {
+      throw new ErrorMessage('您没有权限进行此操作。');
+    }
+    
+    let state = await problem.getJudgeState(res.locals.user, false);
+    
+    problem.tags = await problem.getTags();
+    await problem.loadRelationships();
+    
+    let testcases = await syzoj.utils.parseTestdata(problem.getTestdataPath(), problem.type === 'submit-answer');
+    
+    let discussionCount = await Article.count({ problem_id: id });
+    
+    res.render('practice_problem', {
+      problem: problem,
+      state: state,
+      lastLanguage: res.locals.user ? await res.locals.user.getLastSubmitLanguage() : null,
+      testcases: testcases,
+      discussionCount: discussionCount,
+      pid: id,
+      cid
+    });
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
+
+app.get('/practice/classify/:id', async (req, res) => {
+  try {
+    const c_id = parseInt(req.params.id);
+    const u_id = res.locals.user.id;
+    let ctopQuery = CToP.createQueryBuilder();
+    let query = await Problem.createQueryBuilder();
+    let utopQuery = UToP.createQueryBuilder();
+    let problemArray = await ctopQuery.where("c_id = :id", { id:c_id }).getMany();
+    let utopResult = await utopQuery.where("c_id = :c_id", { c_id }).andWhere("u_id=:u_id", {u_id}).getMany();
+    let problems = await problemArray.mapAsync(async problemArrayInfo => query.where('id=:id', {id: problemArrayInfo.p_id}).getOne());
+    problems.forEach(function(problemItem) {
+      const obj = utopResult.find(function(item){return parseInt(item.p_id) === parseInt(problemItem.id)});
+      problemItem.href = `/practice/classify/${c_id}/problem/${problemItem.id}`;
+      if (obj) {
+        problemItem.statusStr = obj.is_practice && obj.is_finished ? '已练习且已通过' : '已练习但未通过';
+      } else {
+        problemItem.statusStr = '尚未练习'
+      }
+    });
+    problems.sort(function(a, b){
+      return a.id - b.id;
+    })
+    res.render('practice_classify', {
+      user:res.locals.user,
+      problems
+    })
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
+
+app.get('/api/practice/classify/:id', async (req, res) => {
+  try {
+    let id = parseInt(req.params.id);
+    let query = await Classify.createQueryBuilder();
+    let classifyInfo = await query.where('id=:id',{id}).getOne();
+    let problem = await CToP.queryBy({c_id: id});
+    res.send({ classifyInfo, problem:problem.map(function(item){return item.p_id}) });
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+app.get('/api/pass/:cid/:pid',async (req, res) => {
+  try {
+    const c_id = parseInt(req.params.cid);
+    const p_id = parseInt(req.params.pid);
+    const u_id = res.locals.user.id;
+    let utopQuery = UToP.createQueryBuilder();
+    let query = Classify.createQueryBuilder();
+    let userQuery = User.createQueryBuilder();
+    let classify = await Classify.queryAll(query);
+    classify.sort(function(a,b) {
+      return a.order - b.order;
+    });
+    let utopResult = await utopQuery.where("c_id = :c_id", { c_id }).andWhere("u_id=:u_id", {u_id}).andWhere("p_id=:p_id", {p_id}).getOne();
+    // 查询到结果了
+    if (utopResult ) {
+      // mock答题通过了
+      await utopQuery.update(UToP).set({is_finished: 1, practice_num: utopResult.practice_num + 1}).where("c_id = :c_id", { c_id }).andWhere("u_id=:u_id", {u_id}).andWhere("p_id=:p_id", {p_id}).execute();
+      // 说明两个题都练习过了
+    } else {
+      let utop = await UToP.create({
+        u_id,
+        c_id,
+        p_id,
+        is_practice: 1,
+        is_finished: 1,
+        practice_num: 1
+      });
+      await utop.save();
+    }
+    res.send();
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '练习失败，请稍后重试' });
+  }
+});
+
+app.get('/api/practice/nopass/:cid/:pid',async (req, res) => {
+  try {
+    const c_id = parseInt(req.params.cid);
+    const p_id = parseInt(req.params.pid);
+    const u_id = res.locals.user.id;
+    let utopQuery = UToP.createQueryBuilder();
+    let query = Classify.createQueryBuilder();
+    let utopResult = await utopQuery.where("c_id = :c_id", { c_id }).andWhere("u_id=:u_id", {u_id}).andWhere("p_id=:p_id", {p_id}).getOne();
+    // 查询到结果了
+    if (utopResult) {
+      // mock答题通过了
+      await utopQuery.update(UToP).set({is_practice:1, is_finished: 0, practice_num: utopResult.practice_num + 1}).where("c_id = :c_id", { c_id }).andWhere("u_id=:u_id", {u_id}).andWhere("p_id=:p_id", {p_id}).execute();
+      // 说明两个题都练习过了
+    } else {
+      let utop = await UToP.create({
+        u_id,
+        c_id,
+        p_id,
+        is_practice: 1,
+        practice_num: 1,
+        is_finished: 0
+      });
+      await utop.save();
+    }
+    res.send();
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '练习失败，请稍后重试' });
+  }
+});
+
+app.put('/api/practice/classify/update/:id', async (req, res) => {
+  try {
+    let id = parseInt(req.params.id);
+    let u_id = parseInt(res.locals.user.id);
+    let utopQuery = UToP.createQueryBuilder();
+    let classifyQuery = await Classify.createQueryBuilder();
+    let ctopQuery = await CToP.createQueryBuilder();
+    const {name, intro, problemIdArray, order} = req.body;
+    let classifyInfo = await classifyQuery.where('id=:id',{id}).getOne();
+    // 新增题
+    if (problemIdArray.length > classifyInfo.problem_num) {
+      /*
+      * 把当前练习的阶段设置为新增题的阶段，因为新增题后，当前阶段的题目就没答完。
+      * */
+      
+    }
+    // 删除题
+    if (problemIdArray.length < classifyInfo.problem_num) {
+      // 1。找出两个数组的差异
+      function findDifference(source, target){
+        const parseIntTarget = target.map(function(item){
+          return parseInt(item);
+        })
+        return source.filter(function(item){
+          return !parseIntTarget.includes(item);
+        })
+      }
+      let ctopInfo = await ctopQuery.where('c_id=:id',{id}).getMany();
+      const targetArray = ctopInfo.map(function(ctopInfoItem){
+        return ctopInfoItem.p_id;
+      })
+      // 2.从utop表里清除被删除题目的练习记录
+      const differenceArray = findDifference(targetArray, problemIdArray);
+      differenceArray.forEachAsync(async differenceItem => {
+        await utopQuery.delete().from(UToP).where("c_id = :id", { id }).andWhere("u_id=:u_id",{u_id}).andWhere("p_id=:p_id",{p_id:differenceItem}).execute();
+      })
+    }
+    let updateClassifyInfo = await classifyQuery.update(Classify).set({name, intro, order, problem_num: problemIdArray.length}).where("id = :id", { id }).execute();
+    await ctopQuery.delete().from(CToP).where("c_id = :id", { id }).execute();
+    problemIdArray.forEach(async function (item) {
+      let ctop = await CToP.create({
+        c_id: id,
+        p_id: item
+      });
+      await ctop.save();
+    })
+    res.send({ updateClassifyInfo });
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+app.get('/api/getProblem/:id', async (req, res) => {
+  let id = parseInt(req.params.id);
+  try {
+    let query = await Problem.createQueryBuilder();
+    let problemInfo = await query.where('id=:id', {id}).getOne()
+    res.send({ problemInfo});
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+app.get('/api/practice/all', async (req, res) => {
+  try {
+    let classifyQuery = Classify.createQueryBuilder();
+    let ctopQuery = CToP.createQueryBuilder();
+    let result = await Classify.queryAll(classifyQuery);
+    result.sort(function(a,b) {
+      return a.order - b.order;
+    })
+    // if (result.length !== 0) {
+    //   const currentClassifyId = result[0].id;
+    //
+    // }
+    let problem = await CToP.queryAll(ctopQuery);
+    res.send({ result, problem});
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+app.get('/api/admin/practice/all', async (req, res) => {
+  try {
+    let classifyQuery = Classify.createQueryBuilder();
+    let result = await Classify.queryAll(classifyQuery);
+    res.send({ result });
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+app.post('/api/practice/create', async (req, res) => {
+  try {
+    const {name, intro, problemIdArray, order} = req.body;
+    let classify = await Classify.create({
+      name,
+      intro,
+      order,
+      problem_num: problemIdArray.length || 0,
+      updateTime: parseInt((new Date()).getTime() / 1000, 10),
+      createTime: parseInt((new Date()).getTime() / 1000)
+    });
+    await classify.save();
+    let query = Classify.createQueryBuilder();
+    let recordArray =  await Classify.queryAll(query);
+    let lastRecordId = recordArray[recordArray.length - 1].id;
+    problemIdArray.forEach(async function (item) {
+      let ctop = await CToP.create({
+        c_id: lastRecordId,
+        p_id: item
+      })
+      await ctop.save();
+    })
+    res.send();
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '创建失败' });
+  }
+});
+
+app.get('/api/problem/all', async (req, res) => {
+  try {
+    let query = Problem.createQueryBuilder();
+    let result = await Problem.querySomeColumn(query);
+    res.send({ result });
+  } catch(e) {
+    res.send({ error_code: e.errno, error_msg: '失败' });
+  }
+});
+
+
diff --git a/modules/problem.js b/modules/problem.js
index de2d564..5bea7c5 100644
--- a/modules/problem.js
+++ b/modules/problem.js
@@ -220,7 +220,6 @@ app.get('/problem/:id', async (req, res) => {
     let testcases = await syzoj.utils.parseTestdata(problem.getTestdataPath(), problem.type === 'submit-answer');
 
     let discussionCount = await Article.count({ problem_id: id });
-
     res.render('problem', {
       problem: problem,
       state: state,
@@ -599,6 +598,70 @@ app.post('/problem/:id/dis_public', async (req, res) => {
   await setPublic(req, res, false);
 });
 
+app.post('/problem/practice/:pid/:cid/submit', app.multer.fields([{ name: 'answer', maxCount: 1 }]), async (req, res) => {
+  try {
+    let pid = parseInt(req.params.pid);
+    let cid = parseInt(req.params.cid);
+    let problem = await Problem.findById(pid);
+    const curUser = res.locals.user;
+    
+    if (!problem) throw new ErrorMessage('无此题目。');
+    if (problem.type !== 'submit-answer' && !syzoj.config.enabled_languages.includes(req.body.language)) throw new ErrorMessage('不支持该语言。');
+    if (!curUser) throw new ErrorMessage('请登录后继续。', { '登录': syzoj.utils.makeUrl(['login'], { 'url': syzoj.utils.makeUrl(['problem', id]) }) });
+    let judge_state;
+    let code;
+    if (req.files['answer']) {
+      if (req.files['answer'][0].size > syzoj.config.limit.submit_code) throw new ErrorMessage('代码文件太大。');
+      code = (await fs.readFile(req.files['answer'][0].path)).toString();
+    } else {
+      if (Buffer.from(req.body.code).length > syzoj.config.limit.submit_code) throw new ErrorMessage('代码太长。');
+      code = req.body.code;
+    }
+  
+    judge_state = await JudgeState.create({
+      submit_time: parseInt((new Date()).getTime() / 1000),
+      status: 'Unknown',
+      task_id: randomstring.generate(10),
+      code: code,
+      code_length: Buffer.from(code).length,
+      language: req.body.language,
+      user_id: curUser.id,
+      problem_id: pid,
+      is_public: problem.is_public
+    });
+  
+    if (!await problem.isAllowedUseBy(curUser)) throw new ErrorMessage('您没有权限进行此操作。');
+    judge_state.type = 0;
+    await judge_state.save();
+    await judge_state.updateRelatedInfo(true);
+    
+    if (problem.type !== 'submit-answer' && syzoj.languages[req.body.language].format) {
+      let key = syzoj.utils.getFormattedCodeKey(judge_state.code, req.body.language);
+      let formattedCode = await FormattedCode.findOne({
+        where: {
+          key: key
+        }
+      });
+    }
+    
+    try {
+      await Judger.judge(judge_state, problem, 2);
+      judge_state.pending = true;
+      judge_state.status = 'Waiting';
+      await judge_state.save();
+    } catch (err) {
+      throw new ErrorMessage(`无法开始评测：${err.toString()}`);
+    }
+  
+    res.redirect(syzoj.utils.makeUrl(['submission', 'practice', judge_state.id, pid, cid]));
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
+
 app.post('/problem/:id/submit', app.multer.fields([{ name: 'answer', maxCount: 1 }]), async (req, res) => {
   try {
     let id = parseInt(req.params.id);
diff --git a/modules/submission.js b/modules/submission.js
index 2404e8a..da08b67 100644
--- a/modules/submission.js
+++ b/modules/submission.js
@@ -152,6 +152,72 @@ app.get('/submissions', async (req, res) => {
   }
 });
 
+app.get('/submission/practice/:id/:pid/:cid', async (req, res) => {
+  try {
+    const id = parseInt(req.params.id);
+    const pid = parseInt(req.params.pid);
+    const cid = parseInt(req.params.cid);
+    const judge = await JudgeState.findById(id);
+    if (!judge) throw new ErrorMessage("提交记录 ID 不正确。");
+    const curUser = res.locals.user;
+    if (!await judge.isAllowedVisitBy(curUser)) throw new ErrorMessage('您没有权限进行此操作。');
+    
+    await judge.loadRelationships();
+    
+    if (judge.problem.type !== 'submit-answer') {
+      let key = syzoj.utils.getFormattedCodeKey(judge.code, judge.language);
+      if (key) {
+        let formattedCode = await FormattedCode.findOne({
+          where: {
+            key: key
+          }
+        });
+        
+        if (formattedCode) {
+          judge.formattedCode = await syzoj.utils.highlight(formattedCode.code, syzoj.languages[judge.language].highlight);
+        }
+      }
+      judge.code = await syzoj.utils.highlight(judge.code, syzoj.languages[judge.language].highlight);
+    }
+    
+    let isAdmin = curUser === null ? false : curUser.is_admin;
+    let isAuthor = curUser === null ? false : curUser.id === judge.user_id;
+    
+    let currentConfig = Object.assign({}, displayConfig);
+    
+    currentConfig.showRejudge = isAuthor || await judge.problem.isAllowedEditBy(res.locals.user, judge.user_id);
+    if (isAdmin || isAuthor) {
+      currentConfig.showShare = true;
+    }
+    if (isAdmin || isAuthor || judge.is_share) {
+      judge.code = (judge.problem.type !== 'submit-answer') ? judge.code.toString("utf8") : '';
+    } else {
+      judge.code = "作者没有开放此题代码，请联系作者分享。";
+    }
+    res.render('submission', {
+      info: getSubmissionInfo(judge, currentConfig),
+      roughResult: getRoughResult(judge, currentConfig, false),
+      code: judge.code,
+      formattedCode: judge.formattedCode ? judge.formattedCode.toString("utf8") : null,
+      preferFormattedCode: res.locals.user ? res.locals.user.prefer_formatted_code : true,
+      detailResult: processOverallResult(judge.result, currentConfig),
+      socketToken: (judge.pending && judge.task_id != null) ? jwt.sign({
+        taskId: judge.task_id,
+        type: 'detail',
+        displayConfig: displayConfig
+      }, syzoj.config.session_secret) : null,
+      displayConfig: currentConfig,
+      cid,
+      pid
+    });
+  } catch (e) {
+    syzoj.log(e);
+    res.render('error', {
+      err: e
+    });
+  }
+});
+
 app.get('/submission/:id', async (req, res) => {
   try {
     const id = parseInt(req.params.id);
diff --git a/views/admin_classify.ejs b/views/admin_classify.ejs
new file mode 100644
index 0000000..1eb2055
--- /dev/null
+++ b/views/admin_classify.ejs
@@ -0,0 +1,290 @@
+<% this.adminPage = 'classify'; %>
+<% include admin_header %>
+<style>
+    [v-cloak] {
+        display: none;
+    }
+    .current-classify{
+        margin-bottom: 20px;
+    }
+</style>
+<div id="classify" v-cloak>
+    <div class="ui modal classify">
+        <i class="close icon"></i>
+        <div class="header">
+            {{calcModalTitle}}
+        </div>
+        <div class="content">
+            <div class="ui form">
+                <div class="field required" :class="{ error: classifyName.length > 20 }">
+                    <label>练习阶段名称(20字以内)</label>
+                    <input type="text" v-model="classifyName" placeholder="请输入分类名称">
+                </div>
+                <div class="field required" :class="{ error: classifyName.length > 100 }">
+                    <label>练习阶段简介(100字以内)</label>
+                    <input type="text" v-model="classifyIntro" placeholder="请输入分类简介">
+                </div>
+                <div class="field required" >
+                    <label>练习阶段顺序</label>
+                    <el-input-number disabled v-model="order" :min="1" :max="calcOrderMax" label="练习阶段顺序"></el-input-number>
+                </div>
+                <div class="field required" :class="{ error: problemIdArray.length === 0 }">
+                    <label>题目选择(至少包含一道题)</label>
+                    <el-select
+                            style="width:100%"
+                            v-model="problemIdArray"
+                            multiple
+                            filterable
+                            remote
+                            reserve-keyword
+                            placeholder="请输入关键词"
+                            :remote-method="remoteMethod"
+                            :loading="loading">
+                        <el-option
+                                v-for="item in problemOptions"
+                                :key="item.value"
+                                :label="item.label"
+                                :disabled="item.disabled"
+                                :value="item.value">
+                        </el-option>
+                    </el-select>
+                </div>
+                <button class="ui button" @click="submitInfo">{{calcModalTitle}}</button>
+            </div>
+        </div>
+    </div>
+    <div v-if="classifyArray.length === 0">
+        <div class="ui placeholder segment">
+            <div class="ui icon header">
+                <i class="sticky note icon"></i>
+                暂无练习阶段
+            </div>
+        </div>
+    </div>
+    <div v-else>
+        <div class="current-classify">
+            <h4>目前练习阶段</h4>
+            <div class="ui cards">
+                <div class="card" v-for="item in classifyArray">
+                    <div class="content">
+                        <div class="header">{{item.name}}</div>
+                        <div class="description">
+                            {{item.intro}}
+                        </div>
+                    </div>
+                    <div class="ui bottom attached button" @click="show(item.id)">
+                        <i class="add icon"></i>
+                        编辑练习阶段信息
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+    <div class="ui labeled button" tabindex="0" @click="show()">
+        <div class="ui button">
+            <i class="plus icon"></i> 新增练习阶段
+        </div>
+    </div>
+</div>
+<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
+<!-- 引入组件库 -->
+<script src="https://cdn.jsdelivr.net/npm/vue"></script>
+<script src="https://unpkg.com/element-ui/lib/index.js"></script>
+<script>
+  new window.Vue({
+    el: '#classify',
+    data: {
+      problemIdArray: [],
+      order: 1,
+      classifyName: '',
+      classifyIntro: '',
+      classifyArray: [],
+      classifyId: -1,
+      problemOptions: [],
+      loading: false,
+    },
+    created: function() {
+      this.getClassifyInfo();
+    },
+    methods: {
+      remoteMethod(query) {
+        let that = this;
+        if (query !== '') {
+          if (this.usedProblemId.includes(parseInt(query))) {
+            this.$message({
+              message: '这道题已经分配过',
+              type: 'warning'
+            });
+          } else {
+            this.loading = true;
+            setTimeout(() => {
+              $.ajax({
+                url: `/api/v2/search/problems/${query}`,
+                type: 'GET',
+                success: function (data) {
+                  that.problemOptions = data.results.map((item) => {
+                    return {
+                      id: item.value,
+                      label: item.name,
+                      value: item.value,
+                    }
+                  })
+                },
+                error: function (XMLHttpRequest, textStatus, errorThrown) {
+                  alert('创建失败');
+                }
+              });
+              this.loading = false;
+            }, 200);
+          }
+        } else {
+          this.options = [];
+        }
+      },
+      getClassifyInfo: function() {
+        let that = this;
+        $.ajax({
+          url: '/api/practice/all',
+          type: 'GET',
+          success: function (data) {
+            that.classifyArray = data.result;
+            that.usedProblemId = data.problem.map(function(item){return item.p_id});
+          },
+          error: function (XMLHttpRequest, textStatus, errorThrown) {
+            alert('查询失败');
+          }
+        });
+      },
+      resetModal: function() {
+        this.classifyName = '';
+        this.classifyIntro = '';
+        this.problemIdArray = [];
+        this.classifyId = -1;
+        this.problemOptions=[];
+        this.order = this.calcOrderMax;
+      },
+      show: function(id){
+        let that = this;
+        if (id) {
+          this.classifyId = id;
+          $.ajax({
+            url: `/api/practice/classify/${id}`,
+            type: 'GET',
+            success: function (data) {
+              if (!data.error_code) {
+                const {classifyInfo: {id, intro, name, order}, problem} = data;
+                that.classifyName = name;
+                that.classifyIntro = intro;
+                that.problemIdArray = problem;
+                that.order = order;
+                problem.forEach(function(problemId) {
+                  $.ajax({
+                    url: `/api/v2/search/problems/${problemId}`,
+                    type: 'GET',
+                    success: function (data) {
+                      that.problemOptions = data.results.map((item) => {
+                        return {
+                          id: item.value,
+                          label: item.name,
+                          disabled: true,
+                          value: item.value,
+                        }
+                      })
+                    },
+                    error: function (XMLHttpRequest, textStatus, errorThrown) {
+                      alert('创建失败');
+                    }
+                  });
+                })
+              }
+            },
+            error: function (XMLHttpRequest, textStatus, errorThrown) {
+              alert('创建失败');
+            }
+          });
+        } else {
+          this.resetModal();
+        }
+        $('.ui.modal.classify')
+          .modal('show')
+      },
+      checkStringLength: function(string, maxLen) {
+        return string.length > 0 && string.length <= maxLen;
+      },
+      submitInfo: function() {
+        let that = this;
+        let name = this.classifyName;
+        let intro = this.classifyIntro;
+        if(this.checkStringLength(name, 20) && this.checkStringLength(intro, 100) && this.problemIdArray.length > 0) {
+          const obj = {
+            name: this.classifyName,
+            intro: this.classifyIntro,
+            order: this.order,
+            problemIdArray: this.problemIdArray
+          }
+          if (this.classifyId === -1) {
+            $.ajax({
+              url: '/api/practice/create',
+              type: 'POST',
+              async: true,
+              data: obj,
+              success: function (data) {
+                if (data.error_code) {
+                  alert('创建失败');
+                } else {
+                  alert('添加成功');
+                  that.resetModal();
+                  $('.ui.modal.classify')
+                    .modal('hide')
+                  that.getClassifyInfo();
+                }
+              },
+              error: function (XMLHttpRequest, textStatus, errorThrown) {
+                alert('创建失败');
+              }
+            });
+          } else {
+            $.ajax({
+              url: `/api/practice/classify/update/${that.classifyId}`,
+              type: 'PUT',
+              async: true,
+              data: obj,
+              success: function (data) {
+                if (data.error_code) {
+                  alert('更新失败');
+                } else {
+                  alert('更新成功');
+                  that.resetModal();
+                  $('.ui.modal.classify')
+                    .modal('hide')
+                  that.getClassifyInfo();
+                }
+              },
+              error: function (XMLHttpRequest, textStatus, errorThrown) {
+                alert('更新时发生错误');
+              }
+            });
+          }
+
+        }
+      }
+    },
+    computed: {
+      calcModalTitle: function(){
+        if (this.classifyId === -1) {
+          return '新增练习阶段';
+        } else {
+          return '编辑练习阶段'
+        }
+      },
+      calcOrderMax: function() {
+        if (this.classifyId === -1) {
+          return this.classifyArray.length + 1;
+        } else {
+          return this.classifyArray.length
+        }
+      }
+    }
+  })
+</script>
+<% include admin_footer %>
diff --git a/views/admin_config.ejs b/views/admin_config.ejs
index 2c30f6b..fee4013 100644
--- a/views/admin_config.ejs
+++ b/views/admin_config.ejs
@@ -34,7 +34,6 @@ function showBooleanItem(name, text, val) {
   </div>
   <%
 }
-
 for (let item in items) {
   if (items[item] === null) {
     showTitle(item);
diff --git a/views/admin_header.ejs b/views/admin_header.ejs
index cbfe523..b6ab305 100644
--- a/views/admin_header.ejs
+++ b/views/admin_header.ejs
@@ -2,6 +2,7 @@
 let items = {
   info: '统计信息',
   config: '系统配置',
+  classify: '练习阶段管理',
   privilege: '权限管理',
   rejudge: '一键重测',
   links: '友链管理',
diff --git a/views/header.ejs b/views/header.ejs
index aee00e3..d8f2495 100644
--- a/views/header.ejs
+++ b/views/header.ejs
@@ -60,6 +60,7 @@
             <% } %>
             <a class="item<% if (active === '') { %> active<% } %>" href="/"><i class="home icon"></i> 首页</a>
             <a class="item<% if (active.startsWith('problem')) { %> active<% } %>" href="/problems"><i class="list icon"></i> 题库</a>
+            <a class="item<% if (active.startsWith('practice')) { %> active<% } %>" href="/practice"><i class="pencil icon"></i> 练习</a>
             <a class="item<% if (active.startsWith('contest')) { %> active<% } %>" href="/contests"><i class="calendar icon"></i> 比赛</a>
             <a class="item<% if (active.startsWith('submission')) { %> active<% } %>" href="/submissions"><i class="tasks icon"></i> 评测</a>
             <a class="item<% if (active.startsWith('ranklist')) { %> active<% } %>" href="/ranklist"><i class="signal icon"></i> 排名</a>
@@ -73,32 +74,32 @@
               <a href="<%= syzoj.utils.makeUrl(['user', user.id]) %>" style="color: inherit; ">
               <div class="ui simple dropdown item">
                 <%= user.username %><% if (user.nameplate) { %><%- user.nameplate %><% } %> <i class="dropdown icon"></i>
-                <div class="menu">
+                <div class="menu"><div class="ui basic modal" id="modal-restart">
+                        <div class="ui icon header">
+                            <i class="redo icon"></i>
+                            <p style="margin-top: 15px; ">重启服务</p>
+                        </div>
+                        <div class="content" style="text-align: center; ">
+                            <p>确认重新启动 SYZOJ Web 服务吗？</p>
+                        </div>
+                        <div class="actions">
+                            <div class="ui red basic cancel inverted button">
+                                <i class="remove icon"></i>
+                                否
+                            </div>
+                            <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['admin', 'restart'], { url: req.query['url'] || req.originalUrl }) %>">
+                                <i class="checkmark icon"></i>
+                                是
+                            </a>
+                        </div>
+                    </div>
                   <a class="item" href="<%= syzoj.utils.makeUrl(['user', user.id, 'edit']) %>"><i class="edit icon"></i>修改资料</a>
                   <% if (user.is_admin) { %>
                     <a class="item" href="<%= syzoj.utils.makeUrl(['admin', 'info']) %>"><i class="settings icon"></i>后台管理</a>
-                    <div class="ui basic modal" id="modal-restart">
-                      <div class="ui icon header">
-                        <i class="redo icon"></i>
-                        <p style="margin-top: 15px; ">重启服务</p>
-                      </div>
-                      <div class="content" style="text-align: center; ">
-                        <p>确认重新启动 SYZOJ Web 服务吗？</p>
-                      </div>
-                      <div class="actions">
-                        <div class="ui red basic cancel inverted button">
-                          <i class="remove icon"></i>
-                          否
-                        </div>
-                        <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['admin', 'restart'], { url: req.query['url'] || req.originalUrl }) %>">
-                          <i class="checkmark icon"></i>
-                          是
-                        </a>
-                      </div>
-                    </div>
+
                     <a class="item" href="#" onclick="$('#modal-restart').modal('show')"><i class="redo icon"></i>重启服务</a>
                   <% } %>
-                  <a class="item" href-post="<%= syzoj.utils.makeUrl(['logout'], { url: req.originalUrl }) %>"><i class="power icon"></i>注销</a>
+                  <a class="item" href-post="<%= syzoj.utils.makeUrl(['logout'], { url: '/' }) %>"><i class="power icon"></i>注销</a>
                 </div>
               </div>
               </a>
diff --git a/views/practice.ejs b/views/practice.ejs
new file mode 100644
index 0000000..483bfe3
--- /dev/null
+++ b/views/practice.ejs
@@ -0,0 +1,40 @@
+<% this.title = '练习' %>
+<style>
+    #practice{
+        width: 100%;
+    }
+</style>
+<% include header %>
+<div id="practice">
+    <% if(result.length === 0) { %> <div class="ui placeholder segment">
+        <div class="ui icon header">
+            <i class="sticky note icon"></i>
+            暂无题目处于可练习的状态下
+        </div>
+    </div> <% } else { %> <table class="ui very basic center aligned table">
+            <thead>
+            <tr>
+                <th>练习阶段名称</th>
+                <th>练习阶段介绍</th>
+                <th>练习阶段包含题目数量</th>
+                <th>已完成题目数量</th>
+                <th>练习阶段状态</th>
+                <th>是否是当前阶段</th>
+            </tr>
+            </thead>
+            <tbody>
+            <% for (let resultItem of result){%>
+                <tr>
+                    <% if(resultItem.href) { %> <td><a href="<%= resultItem.href%>"><%= resultItem.name%></a></td> <% } else { %> <td><%= resultItem.name%></td> <% } %>
+                    <td><%= resultItem.intro%></td>
+                    <td><%= resultItem.problem_num%></td>
+                        <td><%= resultItem.ac_num%></td>
+                        <% if(resultItem.href) { %> <td>可练习</td> <% } else { %> <td>目前不可练习，完成当前阶段后解锁</td> <% } %>
+                        <% if(resultItem.isNow) { %> <td>是</td> <% } else { %> <td>否</td> <% } %>
+                </tr>
+            <%}%>
+            </tbody>
+        </table> <% } %>
+
+</div>
+<% include footer %>
diff --git a/views/practice_classify.ejs b/views/practice_classify.ejs
new file mode 100644
index 0000000..eae20d7
--- /dev/null
+++ b/views/practice_classify.ejs
@@ -0,0 +1,26 @@
+<% this.title = '练习' %>
+<style>
+</style>
+<% include header %>
+<div id="practice_classify">
+    <table class="ui selectable celled table">
+        <thead>
+        <tr>
+            <th>题目</th>
+            <th>状态</th>
+        </tr>
+        </thead>
+        <tbody>
+            <% for (let problemItem of problems){%>
+                <tr>
+                    <td><a href="<%= problemItem.href %>"><%= problemItem.title %></a></td>
+                    <td><%= problemItem.statusStr %></td>
+                </tr>
+            <%}%>
+        </tbody>
+    </table>
+</div>
+
+<script>
+</script>
+<% include footer %>
diff --git a/views/practice_problem.ejs b/views/practice_problem.ejs
new file mode 100644
index 0000000..fb448a5
--- /dev/null
+++ b/views/practice_problem.ejs
@@ -0,0 +1,392 @@
+<% include util %>
+<%
+if (typeof contest === 'undefined') contest = null;
+if (contest) {
+  this.title = this.alpha(pid) + '. ' + syzoj.utils.removeTitleTag(problem.title) + ' - ' + contest.title + ' - 比赛';
+} else {
+  this.title = problem.title + ' - 题目';
+}
+%>
+<% include header %>
+<style>
+#languages-menu::-webkit-scrollbar, #testcase-menu::-webkit-scrollbar {
+    width: 0px;
+    background: transparent;
+}
+
+#languages-menu .item::after, #testcase-menu .item::after {
+    display: none;
+}
+</style>
+
+<% include monaco-editor %>
+
+<div class="ui center aligned grid">
+    <div class="row">
+      <h1 class="ui header">
+        <% if (contest) { %>
+          <%= this.alpha(pid) %>. <%= syzoj.utils.removeTitleTag(problem.title) %>
+        <% } else { %>
+          #<%= problem.id %>. <%= problem.title %><% if (problem.allowedEdit && !problem.is_public) { %><span class="ui tiny red label">未公开</span><% } %>
+        <% } %>
+      </h1>
+    </div>
+    <% if (problem.type !== 'submit-answer') { %>
+      <div class="row" style="margin-top: -15px">
+          <span class="ui label">内存限制：<%= problem.memory_limit %> MiB</span>
+          <span class="ui label">时间限制：<%= problem.time_limit %> ms</span>
+          <% if (problem.type === 'interaction') { %>
+            <span class="ui label">题目类型：交互</span>
+          <% } else if (problem.file_io) { %>
+            <span class="ui label">输入文件：<%= problem.file_io_input_name %></span>
+            <span class="ui label">输出文件：<%= problem.file_io_output_name %></span>
+          <% } else { %>
+            <span class="ui label">标准输入输出</span>
+          <% } %>
+      </div>
+    <% } %>
+    <% if (problem.type !== 'interaction') { %>
+      <div class="row" style="margin-top: -<%= problem.type === 'submit-answer' ? 15 : 23 %>px">
+          <span class="ui label">题目类型：<%= { 'submit-answer': '答案提交', 'interaction': '交互', 'traditional': '传统' }[problem.type] %></span>
+          <span class="ui label">评测方式：<%= (testcases && !testcases.error) ? (testcases.spj ? 'Special Judge' : '文本比较') : '无测试数据' %></span>
+      </div>
+    <% } %>
+    <% if (!contest) { %>
+        <div class="row" style="margin-top: -23px">
+            <span class="ui label">上传者：
+            <% if (problem.is_anonymous && !problem.allowedManage) { %>
+              匿名
+            <% } else { %>
+              <a href="<%= syzoj.utils.makeUrl(['user', problem.user_id]) %>"><%= problem.user.username %></a>
+            <% } %>
+            </span>
+            <% if (problem.allowedManage) { %>
+                <span class="ui label">公开者：
+                <% if (problem.publicizer) { %>
+                  <a href="<%= syzoj.utils.makeUrl(['user', problem.publicizer_id]) %>"><%= problem.publicizer.username %></a>
+                <% } else { %>
+                  未知
+                <% } %>
+                </span>
+            <% } %>
+        </div>
+    <% } %>
+</div>
+<div class="ui grid">
+  <div class="row">
+    <div class="column">
+      <div class="ui buttons">
+        <% if (typeof contest !== 'undefined' && contest) { %>
+          <% if (!contest.ended) { %>
+            <a class="small ui primary button" href="#submit_code">提交</a>
+          <% } else { %>
+            <a class="small ui primary button" href="<%= syzoj.utils.makeUrl(['problem', problem.id]) %>">转到题库</a>
+          <% } %>
+          <a class="small ui positive button" href="<%= syzoj.utils.makeUrl(['contest', contest.id, 'submissions'], { problem_id: pid }) %>">提交记录</a>
+          <% if (problem.additional_file) { %>
+            <a class="small ui teal button" href="<%= syzoj.utils.makeUrl(['contest', contest.id, pid, 'download', 'additional_file']) %>">附加文件</a>
+          <% } %>
+          <a href="<%= syzoj.utils.makeUrl(['contest', contest.id]) %>" class="ui orange button">返回比赛</a>
+        <% } else { %>
+          <% if (testcases && !testcases.error) { %>
+            <a class="small ui primary button" href="#submit_code">提交</a>
+          <% } %>
+          <a class="small ui positive button" href="<%= syzoj.utils.makeUrl(['submissions'], { problem_id: problem.id }) %>">提交记录</a>
+          <a class="small ui orange button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'statistics', problem.type === 'submit-answer' ? 'shortest' : 'fastest']) %>">统计</a>
+          <a class="small ui yellow button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'testdata']) %>">测试数据</a>
+          <% if (problem.additional_file) { %>
+            <a class="small ui teal button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'download', 'additional_file']) %>">附加文件</a>
+          <% } %>
+          <a class="small ui brown button" href="<%= syzoj.utils.makeUrl(['discussion', 'problem', problem.id]) %>" style="position: relative; ">
+            讨论
+            <% if (discussionCount) { %>
+              <div class="floating ui red tiny circular label" style="background-color: #8c5633 !important; top: -0.6em; "><%= discussionCount %></div>
+            <% } %>
+          </a>
+        <% } %>
+      </div>
+      <% if (!contest) { %>
+        <div class="ui buttons right floated">
+          <% if (problem.allowedEdit) { %>
+            <a class="small ui button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'edit']) %>">编辑</a>
+            <a class="small ui button" href="<%= syzoj.utils.makeUrl(['problem', problem.id, 'manage']) %>">管理</a>
+          <% } %>
+          <% if (problem.allowedManage) { %>
+            <% if (problem.is_public) {  %>
+              <a class="small ui button" id="dis_public" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'dis_public']) %>">取消公开</a>
+            <% } else { %>
+              <a class="small ui button" id="public" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'public']) %>">公开</a>
+            <% } %>
+            <div class="ui basic modal" id="modal-delete">
+              <div class="ui icon header">
+                <i class="trash icon"></i>
+                <p style="margin-top: 15px; ">删除题目</p>
+              </div>
+              <div class="content" style="text-align: center; ">
+                <p>确认删除此题目吗？提交记录、讨论以及测试数据将一并删除。<br>
+                删除题目导致的修改用户提交、通过数量可能会耗费一些时间。</p>
+                <b>警告：删除比赛中的题目会导致系统错乱！请确认没有比赛使用此题目。</b>
+              </div>
+              <div class="actions">
+                <div class="ui red basic cancel inverted button">
+                  <i class="remove icon"></i>
+                  否
+                </div>
+                <a class="ui green ok inverted button" href-post="<%= syzoj.utils.makeUrl(['problem', problem.id, 'delete']) %>">
+                  <i class="checkmark icon"></i>
+                  是
+                </a>
+              </div>
+            </div>
+            <div class="small ui red button" onclick="$('#modal-delete').modal('show')">删除</div>
+          <% } %>
+        </div>
+      <% } %>
+    </div>
+  </div>
+  <% if (problem.description) { %>
+  <div class="row">
+    <div class="column">
+      <h4 class="ui top attached block header">题目描述</h4>
+      <div class="ui bottom attached segment font-content"><%- problem.description %></div>
+    </div>
+  </div>
+  <% } %>
+  <% if (problem.input_format) { %>
+  <div class="row">
+    <div class="column">
+        <h4 class="ui top attached block header">输入格式</h4>
+        <div class="ui bottom attached segment font-content"><%- problem.input_format %></div>
+    </div>
+  </div>
+  <% } %>
+  <% if (problem.output_format) { %>
+    <div class="row">
+        <div class="column">
+          <h4 class="ui top attached block header">输出格式</h4>
+          <div class="ui bottom attached segment font-content"><%- problem.output_format %></div>
+        </div>
+    </div>
+  <% } %>
+  <% if (problem.example) { %>
+    <div class="row">
+        <div class="column">
+          <h4 class="ui top attached block header">样例</h4>
+          <div class="ui bottom attached segment font-content"><%- problem.example %></div>
+        </div>
+    </div>
+  <% } %>
+  <% if (problem.limit_and_hint) { %>
+    <div class="row">
+        <div class="column">
+          <h4 class="ui top attached block header">数据范围与提示</h4>
+          <div class="ui bottom attached segment font-content"><%- problem.limit_and_hint %></div>
+        </div>
+    </div>
+  <% } %>
+  <% if (problem.tags && problem.tags.length && (typeof contest === 'undefined' || !contest)) { %>
+    <div class="row">
+      <div class="column">
+        <h4 class="ui block header" id="show_tag_title_div" style="margin-bottom: 0; margin-left: -1px; margin-right: -1px; "><a href="#" id="show_tag_button" style="color: #000; ">显示分类标签</a></h4>
+        <div class="ui bottom attached segment" style="display: none; " id="show_tag_div">
+          <% for (let tag of problem.tags) { %>
+            <a href="<%= syzoj.utils.makeUrl(['problems', 'tag', tag.id]) %>" class="ui medium <%= tag.color %> label">
+              <%= tag.name %>
+            </a>
+          <% } %>
+        </div>
+      </div>
+    </div>
+    <script>
+    $(function () {
+      $('#show_tag_button').click(function (e) {
+        e.preventDefault();
+        $('#show_tag_title_div').addClass('top');
+        $('#show_tag_title_div').addClass('top attached');
+        $('#show_tag_title_div').text('分类标签');
+        $('#show_tag_div').css('display', '');
+      })
+    });
+    </script>
+  <% } %>
+    <% let noSubmit = false; %>
+    <%
+    if (typeof contest !== 'undefined' && contest && contest.ended || (!testcases || testcases.error)) {
+      noSubmit = true;
+    }
+    %>
+    <% if (!noSubmit) { %>
+    <div class="row">
+        <div class="column">
+          <%
+          const formUrl = syzoj.utils.makeUrl(['problem', 'practice', problem.id, cid, 'submit']);
+          %>
+          <form action="<%= formUrl %>" method="post" onsubmit="return submit_code()" id="submit_code" enctype="multipart/form-data">
+            <% if (problem.type === 'submit-answer') { %>
+              <%
+              let cases = [];
+              if (testcases && !testcases.error) {
+                for (let subtasks of testcases) {
+                  for (let testcase of subtasks.cases) {
+                    cases.push(testcase.answer);
+                  }
+                }
+              }
+              %>
+              <script>
+              var cases = <%- serializejs(cases) %>, currCase = 0;
+              </script>
+              <div class="ui grid">
+                <% if (testcases) { %>
+                <div class="four wide column" style="margin-right: -25px; ">
+                  <div class="ui attached vertical fluid pointing menu" id="testcase-menu" style="height: 370px; overflow-y: scroll; overflow-x: hidden; ">
+                    <% for (let i = 0; i < cases.length; i++) { %>
+                      <a style="border-radius: 0; " class="item<%= i === 0 ? ' active' : '' %>" data-value="<%= i %>">
+                        <%= cases[i] %>
+                      </a>
+                    <% } %>
+                  </div>
+                </div>
+                <div class="twelve wide stretched column" style="position: relative; padding-left: 0; margin-left: calc(-1rem - 1px); width: calc(75% + 1rem + 13px) !important; ">
+                  <% for (let i = 0; i < cases.length; i++) { %>
+                    <div id="editor-<%= i %>" class="editor" style="position: absolute; width: 100%; height: calc(100% - 28px); border: 1px solid #D4D4D5; overflow: hidden; <%= i === 0 ? '' : 'visibility: hidden; ' %>">
+                      <%- this.showLoadingEditor(); %>
+                    </div>
+                  <% } %>
+                </div>
+                <% } %>
+                <input id="answer_by_editor" name="answer_by_editor" type="hidden">
+                <script>
+                window.onEditorLoaded(function () {
+                  window.editors = [];
+                  for (var i = 0; i < cases.length; i++) {
+                    var editor = window.createCodeEditor(document.getElementById("editor-" + i));
+                    editors[i] = editor;
+                  }
+
+                  $(function () {
+                    $('#testcase-menu .item').click(function() {
+                      $(this)
+                        .addClass('active')
+                        .closest('.ui.menu')
+                        .find('.item')
+                          .not($(this))
+                          .removeClass('active')
+                      ;
+
+                      var x = $(this).attr('data-value');
+                      if (currCase != x) {
+                        $('#editor-' + currCase).css('visibility', 'hidden');
+                        $('#editor-' + x).css('visibility', 'visible');
+                        currCase = x;
+                      }
+                    });
+                  });
+                });
+                </script>
+                <div class="ui form" style="width: 100%; ">
+                  <div class="inline fields" style="width: 100%; ">
+                    <div class="field" style="margin: 0 auto; ">
+                      <label for="answer">或者，上传答案（请使用 ZIP 格式压缩）</label>
+                      <input type="file" id="answer" name="answer">
+                    </div>
+                  </div>
+                </div>
+              </div>
+              <div class="ui center aligned vertical segment" style="padding-bottom: 0; "><button type="submit" class="ui labeled icon button"><i class="ui edit icon"></i>提交</button></div>
+            <% } else { %>
+              <input name="language" type="hidden" id="form">
+              <input name="code" type="hidden">
+              <div class="ui grid">
+                <div class="four wide column" style="margin-right: -25px; ">
+                  <div class="ui attached vertical fluid pointing menu" id="languages-menu" style="height: 370px; overflow-y: scroll; overflow-x: hidden; ">
+                    <%
+                    let language = syzoj.config.enabled_languages[0];
+                    if (state) {
+                      language = state.language;
+                    } else if (lastLanguage) language = lastLanguage;
+                    %>
+                    <% for (lang of syzoj.config.enabled_languages) { %>
+                      <a style="border-radius: 0; " class="item<%= lang === language ? ' active' : '' %>" data-value="<%= lang %>" data-mode="<%= syzoj.languages[lang].editor %>">
+                        <%= syzoj.languages[lang].show %>
+                        <div class="ui right floated" style="opacity: 0.4; margin-top: 8px; font-size: 0.7em; "><%= syzoj.languages[lang].version %></div>
+                      </a>
+                    <% } %>
+                  </div>
+                </div>
+                <div class="twelve wide stretched column" style="position: relative; padding-left: 0; margin-left: calc(-1rem - 1px); width: calc(75% + 1rem + 13px) !important; ">
+                  <div id="editor" style="position: absolute; width: 100%; height: calc(100% - 28px); border: 1px solid #D4D4D5; overflow: hidden; " class="editor">
+                    <%- this.showLoadingEditor(); %>
+                  </div>
+                </div>
+                <div class="ui form" style="width: 100%; ">
+                  <div class="inline fields" style="width: 100%; ">
+                    <div class="field" style="margin: 0 auto; ">
+                      <label for="answer">或者，上传代码文件</label>
+                      <input type="file" id="answer" name="answer">
+                    </div>
+                  </div>
+                </div>
+              </div>
+              <div class="ui center aligned vertical segment" style="padding-bottom: 0; ">
+                <button type="submit" class="ui labeled icon button"><i class="ui edit icon"></i>提交</button>
+              </div>
+            <% } %>
+          </form>
+        </div>
+    </div>
+    <% } %>
+</div>
+
+<% if (problem.type !== 'submit-answer') { %>
+<script type="text/javascript">
+  var editor;
+  window.onEditorLoaded(function () {
+    var editorElement = document.getElementById('editor');
+    var content = '';
+    <% if (state) { %>content = <%- serializejs(state.code) %>;<% } %>
+    editor = window.createCodeEditor(editorElement, $('#languages-menu .item.active').data('mode'), content);
+    window.editor = editor;
+  });
+
+  var lastSubmitted = '';
+
+  function submit_code() {
+    if (!$('#submit_code input[name=answer]').val().trim() && !editor.getValue().trim()) return false;
+    $('#submit_code input[name=language]').val($('#languages-menu .item.active').data('value'));
+    lastSubmitted = editor.getValue();
+    $('#submit_code input[name=code]').val(editor.getValue());
+    return true;
+  }
+
+  $('#languages-menu')[0].scrollTop = $('#languages-menu .active')[0].offsetTop - $('#languages-menu')[0].firstElementChild.offsetTop;
+
+  $(function () {
+    $('#languages-menu .item').click(function() {
+      $(this)
+        .addClass('active')
+        .closest('.ui.menu')
+        .find('.item')
+          .not($(this))
+          .removeClass('active')
+      ;
+      monaco.editor.setModelLanguage(editor.getModel(), $(this).data('mode'));
+    });
+  });
+</script>
+
+<% } else { %>
+  <script>
+  function submit_code() {
+    var a = [];
+    for (var i = 0; i < cases.length; i++) {
+      a.push({
+        filename: cases[i],
+        data: editors[i].getValue()
+      });
+    }
+    $('#answer_by_editor').val(JSON.stringify(a));
+  }
+  </script>
+<% } %>
+<% include footer %>
diff --git a/views/submission.ejs b/views/submission.ejs
index 04ffb91..cf9856e 100644
--- a/views/submission.ejs
+++ b/views/submission.ejs
@@ -311,8 +311,11 @@ const vueApp = new Vue({
     $('.ui.accordion').off().accordion({ selector: { trigger: '.title:not(.unexpandable)' } });
   }
 });
+console.log(token);
 if (token != null) {
   const loadSocketIO = function () {
+    const cid = <%= cid%>;
+    const pid = <%= pid%>;
     let currentVersion = 0;
     const socket = io(socketUrl);
     socket.on('connect', function () {
@@ -337,6 +340,27 @@ if (token != null) {
         console.log("Judge finished");
         vueApp.roughData.running = false;
         vueApp.roughData.result = p.roughResult;
+        if (p.roughResult.result === 'Accepted') {
+          $.ajax({
+            url: `/api/practice/pass/${cid}/${pid}`,
+            type: 'GET',
+            success: function (data) {
+            },
+            error: function (XMLHttpRequest, textStatus, errorThrown) {
+              alert('练习功能发生故障');
+            }
+          });
+        } else {
+          $.ajax({
+            url: `/api/practice/nopass/${cid}/${pid}`,
+            type: 'GET',
+            success: function (data) {
+            },
+            error: function (XMLHttpRequest, textStatus, errorThrown) {
+              alert('练习功能发生故障');
+            }
+          });
+        }
         vueApp.detailResult = p.result;
         socket.close();
       });
@@ -345,8 +369,9 @@ if (token != null) {
         if (data && data.ok) {
           if (data.finished) {
             vueApp.roughData.result = data.roughResult;
-            if (!data.result) location.reload(true);
+            // if (!data.result) location.reload(true);
             vueApp.detailResult = data.result;
+            vueApp.roughData.running = false;
             socket.close();
           } else {
             if (data.running) {