Update to v2.3.1

README.md

@@ -64,13 +64,11 @@ It is just so interesting. What it can do is under exploration.
 >
 > Tips: When updating, please keep the original database in case of data loss.
 
-### Version 2.3
-- 适用于Arcaea 3.5.2版本 For Arcaea 3.5.2
-- 更新了歌曲数据库 Update the song database.
-- 新搭档**迷尔**已解锁 Unlock the new character **Mir**.
-- 新增服务器日志 Add server log.
-- 优化了代码结构 Optimize the code structure.
-- 修复了一些Bug，提升服务器安全性 Fix some bugs and improve server security.
+### Version 2.3.1
+- **不**适用于Arcaea 3.5.3版本 **Not** for Arcaea 3.5.3
+- **新增**了一些Bug **Add** some bugs.
+
+> Happy April Fool's Day!
 
 
 ## 运行环境与依赖 Running environment and requirements
@@ -79,8 +77,7 @@ It is just so interesting. What it can do is under exploration.
 - Flask module
 - Charles (optional)
 
-<div style='display: none'>
-
+<!--
 ## 环境搭建 Environment construction
 [中文](https://github.com/Lost-MSth/Arcaea-server/wiki/%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA)  
 [English](https://github.com/Lost-MSth/Arcaea-server/wiki/Environment-construction)
@@ -92,8 +89,7 @@ It is just so interesting. What it can do is under exploration.
 ## 注意 Attentions
 [中文](https://github.com/Lost-MSth/Arcaea-server/wiki/%E6%B3%A8%E6%84%8F)  
 [English](https://github.com/Lost-MSth/Arcaea-server/wiki/Attentions)
-
-</div>
+-->
 
 ## 鸣谢 Thanks
 歌曲数据库来自 Using song database from