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diff --git a/img/readme/quickstart/write/widthAndHeightWrite.png b/img/readme/quickstart/write/widthAndHeightWrite.png
deleted file mode 100644
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diff --git a/img/readme/wechat.png b/img/readme/wechat.png
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diff --git a/src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java b/src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java
index 72a27e7..4002b84 100644
--- a/src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java
+++ b/src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java
@@ -1,13 +1,10 @@
 package com.alibaba.excel.analysis;
 
-import java.io.FileInputStream;
 import java.io.InputStream;
 import java.util.List;
 
 import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey;
-import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.poifs.crypt.Decryptor;
-import org.apache.poi.poifs.crypt.EncryptionInfo;
 import org.apache.poi.poifs.filesystem.DocumentFactoryHelper;
 import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 import org.apache.poi.util.IOUtils;
diff --git a/update.md b/update.md
index 36b2381..f389bbf 100644
--- a/update.md
+++ b/update.md
@@ -1,3 +1,6 @@
+# 2.1.0-bea5
+
+
 # 2.1.0-beta4
 * 修改最长匹配策略会空指针的bug [Issue #747](https://github.com/alibaba/easyexcel/issues/747)
 * 修改afterRowDispose错误 [Issue #751](https://github.com/alibaba/easyexcel/issues/751)