diff --git a/migrates/format-old-codes.js b/migrates/format-old-codes.js
index 28b6599..fa08fd9 100755
--- a/migrates/format-old-codes.js
+++ b/migrates/format-old-codes.js
@@ -1,47 +1,6 @@
 /*
- * This script will help format all submissions' codes whose id in a interval.
+ * After moving to TypeORM, this script no longer works.
+ * If you have NOT migrated to TypeORM, please follow
+ * https://github.com/syzoj/syzoj/wiki/TypeORM-%E8%BF%81%E7%A7%BB%E6%8C%87%E5%8D%97
  * 
- * Useful when upgrading from a version that doesn't support code formatting.
  */
-
-const JudgeState = syzoj.model('judge_state');
-const FormattedCode = syzoj.model('formatted_code');
-const CodeFormatter = syzoj.lib('code_formatter');
-require('.');
-
-const fn = async (begin, end) => {
-  for (let i = begin; i < end; i++) {
-    const judge_state = await JudgeState.fromID(i);
-    if (!judge_state) continue;
-
-    if (!judge_state.language) continue;
-
-    const key = syzoj.utils.getFormattedCodeKey(judge_state.code, judge_state.language);
-    if (!key) continue;
-
-    let formatted_code = await FormattedCode.findOne({ where: { key: key } });
-
-    const code = await CodeFormatter(judge_state.code, syzoj.languages[judge_state.language].format);
-    if (code === null) {
-      console.error(`Format ${i} failed.`);
-      continue;
-    }
-
-    if (!formatted_code) {
-      formatted_code = await FormattedCode.create({
-        key: key,
-        code: code
-      });
-    } else continue; // formatted_code.code = code;
-
-    try {
-      await formatted_code.save();
-      console.error(`Format and save ${i} success.`);
-    } catch (e) {
-      console.error(`Save ${i} failed:`, e);
-    }
-  }
-};
-
-// NOTE: Uncomment and fill arguments to run.
-// fn(begin, end) // [begin, end)
diff --git a/migrates/html-table-merge-cell-to-md.js b/migrates/html-table-merge-cell-to-md.js
index 475fe1b..1209d02 100755
--- a/migrates/html-table-merge-cell-to-md.js
+++ b/migrates/html-table-merge-cell-to-md.js
@@ -1,127 +1,6 @@
 /*
- * This script will help migrate from the old marked-based markdown renderer
- * to the new markdown-it based (syzoj-renderer).
- * 
- * The later doesn't support inline markdown inside HTML blocks. But in
- * LibreOJ that's widely used in problem's limits' cell-merged table displaying
- * displaying. So TeX maths inside are broken.
+ * After moving to TypeORM, this script no longer works.
+ * If you have NOT migrated to TypeORM, please follow
+ * https://github.com/syzoj/syzoj/wiki/TypeORM-%E8%BF%81%E7%A7%BB%E6%8C%87%E5%8D%97
+ *
  */
-
-const cheerio = require('cheerio');
-
-function processMarkdown(text) {
-  return text.replace(/(<table(?:[\S\s]+?)<\/table>)/gi, (match, offset, string) => {
-    const $ = cheerio.load(match, { decodeEntities: false }),
-          table = $('table');
-
-    let defaultAlign = '-';
-    if (table.hasClass('center')) defaultAlign = ':-:';
-    else if (table.hasClass('left')) defaultAlign = ':-';
-    else if (table.hasClass('right')) defaultAlign = '-:';
-    
-    let columnCount = 0;
-    const columnAlign = [];
-    table.find('th').each((i, th) => {
-      const count = parseInt($(th).attr('colspan')) || 1;
-      columnCount += count;
-
-      const style = ($(th).attr('style') || '').split(' ').join('').toLowerCase();
-      if (style.includes('text-align:center')) columnAlign.push(':-:');
-      else if (style.includes('text-align:left')) columnAlign.push(':-');
-      else if (style.includes('text-align:right')) columnAlign.push('-:');
-      else columnAlign.push(defaultAlign);
-    });
-
-    const rowCount = table.find('tr').length;
-
-    function escape(s) {
-      return ` ${s.trim().split('|').join('\\|')} `;
-    }
-
-    const matrix = Array(rowCount).fill(null).map(() => []);
-    table.find('tr').each((i, tr) => {
-      const cells = $(tr).find('th, td');
-
-      let columnIndex = 0, resColumnIndex = 0;
-      cells.each((j, td) => {
-        while (typeof matrix[i][resColumnIndex] !== 'undefined') resColumnIndex++;
-
-        if (columnIndex >= columnCount) return false;
-        if (resColumnIndex >= columnCount) return false;
-
-        const colspan = parseInt($(td).attr('colspan')) || 1,
-              rowspan = parseInt($(td).attr('rowspan')) || 1,
-              content = $(td).html();
-        
-        for (let cntRow = 0; cntRow < rowspan; cntRow++) {
-          for (let cntCol = 0; cntCol < colspan; cntCol++) {
-            if (i + cntRow < rowCount && resColumnIndex + cntCol < columnCount) {
-              matrix[i + cntRow][resColumnIndex + cntCol] = escape(content);
-            }
-          }
-        }
-
-        resColumnIndex += colspan;
-      });
-    });
-
-    const code = [matrix[0], columnAlign, ...matrix.slice(1)].map(row => `|${row.join('|')}|`).join('\n');
-
-    return `<!-- BEGIN: Migrated markdown table -->\n\n${code}\n\n<!-- Migrated from original HTML table:\n${match}\n-->\n\n<!-- END: Migrated markdown table -->`;
-  });
-}
-
-// Load syzoj.
-process.chdir(__dirname + '/..');
-require('..');
-
-const modelFields = {
-  problem: [
-    'description',
-    'input_format',
-    'output_format',
-    'example',
-    'limit_and_hint'
-  ],
-  contest: [
-    'information',
-    'problems'
-  ],
-  article: [
-    'content'
-  ],
-  'article-comment': [
-    'content'
-  ]
-};
-
-const fn = async () => {
-  for (const model in modelFields) {
-    const modelObject = syzoj.model(model);
-    const allData = await modelObject.all();
-
-    let cnt = 0, tot = allData.length;
-    for (const obj of allData) {
-      console.log(`${model}: ${++cnt}/${tot}`);
-
-      let modified = false;
-
-      for (field of modelFields[model]) {
-        const processed = processMarkdown(obj[field]);
-        if (processed != obj[field]) {
-          obj[field] = processed;
-          modified = true;
-        }
-      }
-
-      if (modified) {
-        await obj.save();
-      }
-    }
-  }
-
-  process.exit();
-};
-
-// NOTE: Uncomment to run.
-// fn();