diff --git a/.gitignore b/.gitignore
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+++ /dev/null
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-*.pyc
diff --git a/docs/.nojekyll b/.nojekyll
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diff --git a/.python-version b/.python-version
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--- a/.python-version
+++ /dev/null
@@ -1 +0,0 @@
-3.6.2
diff --git a/CNAME b/CNAME
deleted file mode 100644
index 3dfa6c8..0000000
--- a/CNAME
+++ /dev/null
@@ -1 +0,0 @@
-docs.onlinejudge.me
\ No newline at end of file
diff --git a/README.md b/README.md
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index 0000000..38975c2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+# Qingdao University Online Judge
+
+- Based on Docker; One-click deployment
+- ACM/OI rule support; realtime/non-realtime rank support
+- Multi-language support
+- Markdown & MathJax support
diff --git a/_coverpage.md b/_coverpage.md
new file mode 100644
index 0000000..79e470b
--- /dev/null
+++ b/_coverpage.md
@@ -0,0 +1,7 @@
+# Qingdao University Online Judge
+
+> An open source online judge system based on Python and Vue
+
+[GitHub](https://github.com/QingdaoU/OnlineJudge)
+[Demo](https://qduoj.com)
+[Get Started](/en/guide/installation)
diff --git a/_sidebar.md b/_sidebar.md
new file mode 100644
index 0000000..844d917
--- /dev/null
+++ b/_sidebar.md
@@ -0,0 +1,25 @@
+- 用户指南
+  - [部署](onlinejudge/guide/deploy.md)
+  - [测试用例格式](onlinejudge/guide/test_case.md)
+  - [比赛模式](onlinejudge/guide/contest_rule_type.md)
+  - [用户导入](onlinejudge/guide/import_users.md)
+  - [Special Judge](onlinejudge/guide/special_judge.md)
+  - [MathJax](onlinejudge/guide/mathjax.md)
+  - [多个评测机](onlinejudge/guide/multi_judge_server.md)
+  - [代码升级说明](onlinejudge/guide/upgrade.md)
+  - [HTTPS相关问题](onlinejudge/guide/https.md)
+  - [使用CDN](onlinejudge/guide/using_cdn.md)
+  - [数据备份和恢复](onlinejudge/guide/backup.md)
+  - [修改前端](onlinejudge/guide/update_fe.md)
+  - [修改编译选项](onlinejudge/guide/update_compile_options.md)
+- JudgeServer
+  - [API](judgeserver/api.md)
+  - [Deploy](judgeserver/deploy.md)
+  - [TestCase](judgeserver/testcase.md)
+- Judger
+  - [API](judger/api.md)
+  - [工作原理](judger/how_it_works.md)
+- [常见问题](onlinejudge/faq.md)
+- [交流群](onlinejudge/guide/qq_group.md)
+- [从旧版迁移](onlinejudge/from_old.md)
+- [开发团队](onlinejudge/dev-team.md)
diff --git a/docs/.gitignore b/docs/.gitignore
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index cdb93cd..0000000
--- a/docs/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-.python-version
diff --git a/docs/CNAME b/docs/CNAME
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--- a/docs/CNAME
+++ /dev/null
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-opensource.qduoj.com
\ No newline at end of file
diff --git a/docs/README.md b/docs/README.md
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index e8c51a4..0000000
--- a/docs/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# OnlineJudge Documents
-
-## 用户
-
- - 青岛大学 https://qduoj.com
- - 四川师范大学 https://acm.sicnu.edu.cn/
- - [欢迎提交](/onlinejudge/guide/qq_group)
-
-## 赞助我们
-
-<img src="https://storage.virusdefender.net/blog/images/utils/wx_pay_new.JPG" style="width: 40%; height: 40%">
\ No newline at end of file
diff --git a/docs/_coverpage.md b/docs/_coverpage.md
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index b737d48..0000000
--- a/docs/_coverpage.md
+++ /dev/null
@@ -1,13 +0,0 @@
-# OnlineJudge <small>2.0</small>
-
-> An open source online judge system based on Python and Vue
-
-- Based on Docker; One-click deployment
-- ACM/OI rule support; realtime/non-realtime rank support
-- Multi-language support
-- Markdown & MathJax support
-
-
-[GitHub](https://github.com/QingdaoU/OnlineJudge)
-[Demo](https://qduoj.com)
-[Get Started](/onlinejudge/guide/deploy)
diff --git a/docs/_sidebar.md b/docs/_sidebar.md
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index c71f88c..0000000
--- a/docs/_sidebar.md
+++ /dev/null
@@ -1,30 +0,0 @@
-- OnlineJudge
-
-  - 用户指南
-    - [部署](onlinejudge/guide/deploy.md)
-    - [测试用例格式](onlinejudge/guide/test_case.md)
-    - [比赛模式](onlinejudge/guide/contest_rule_type.md)
-    - [用户导入](onlinejudge/guide/import_users.md)
-    - [Special Judge](onlinejudge/guide/special_judge.md)
-    - [MathJax](onlinejudge/guide/mathjax.md)
-    - [多个评测机](onlinejudge/guide/multi_judge_server.md)
-    - [代码升级说明](onlinejudge/guide/upgrade.md)
-    - [HTTPS相关问题](onlinejudge/guide/https.md)
-    - [使用CDN](onlinejudge/guide/using_cdn.md)
-    - [数据备份和恢复](onlinejudge/guide/backup.md)
-    - [修改前端](onlinejudge/guide/update_fe.md)
-    - [修改编译选项](onlinejudge/guide/update_compile_options.md)
-  - [常见问题](onlinejudge/faq.md)
-  - [交流群](onlinejudge/guide/qq_group.md)
-  - [从旧版迁移](onlinejudge/from_old.md)
-  - [开发团队](onlinejudge/dev-team.md)
-
-- JudgeServer
-  - [API](judgeserver/api.md)
-  - [Deploy](judgeserver/deploy.md)
-  - [TestCase](judgeserver/testcase.md)
-
-- Judger
-
-  - [API](judger/api.md)
-  - [工作原理](judger/how_it_works.md)
diff --git a/docs/guide.md b/docs/guide.md
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index 00bcb6e..0000000
--- a/docs/guide.md
+++ /dev/null
@@ -1 +0,0 @@
-# test
\ No newline at end of file
diff --git a/docs/index.html b/docs/index.html
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--- a/docs/index.html
+++ /dev/null
@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Document</title>
-  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
-  <meta name="description" content="Description">
-  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/vue.css">
-  <style>
-    .sidebar li>p {
-      font-size: 16px;
-    }
-  </style>
-</head>
-<body>
-  <div id="app"></div>
-  <script>
-    window.$docsify = {
-      name: 'OnlineJudge',
-      loadSidebar: true,
-      autoHeader: true,
-      coverpage: true,
-    }
-  </script>
-  <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
-  <script src="//unpkg.com/docsify/lib/plugins/zoom-image.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-c.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-yaml.min.js"></script>
-</body>
-</html>
diff --git a/index.html b/index.html
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+++ b/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
+  <meta name="viewport" content="width=device-width,initial-scale=1" />
+  <meta charset="UTF-8" />
+  <title>Qingdao University Online Judge</title>
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@4.13.1/lib/themes/vue.min.css" />
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/prismjs@1.29.0/themes/prism.min.css" />
+  <style>
+    .sidebar li > p {
+      font-size: 16px;
+    }
+  </style>
+</head>
+<body>
+  <div id="app"></div>
+  <script src="//cdn.jsdelivr.net/npm/mermaid@9.4.3/dist/mermaid.min.js"></script>
+  <script>
+    let num = 0;
+    mermaid.initialize({ startOnLoad: false });
+
+    window.$docsify = {
+      name: 'OnlineJudge',
+      loadSidebar: true,
+      coverpage: true,
+      alias: {
+        '/.*/_sidebar.md': '/_sidebar.md',
+      },
+      markdown: {
+        renderer: {
+          code: function(code, lang) {
+            if (lang === "mermaid") {
+              return (
+                '<div class="mermaid">' + mermaid.render('mermaid-svg-' + num++, code) + "</div>"
+              );
+            }
+            return this.origin.code.apply(this, arguments);
+          }
+        }
+      },
+    };
+  </script>
+  <script defer src="//cdn.jsdelivr.net/npm/docsify@4.13.1/lib/docsify.min.js"></script> 
+  <script defer src="//cdn.jsdelivr.net/npm/docsify@4.13.1/lib/plugins/zoom-image.min.js"></script>
+  <script defer src="//cdn.jsdelivr.net/npm/prismjs@1.29.0/components/prism-bash.min.js"></script>
+  <script defer src="//cdn.jsdelivr.net/npm/prismjs@1.29.0/components/prism-yaml.min.js"></script>
+  <script defer src="//cdn.jsdelivr.net/npm/prismjs@1.29.0/components/prism-c.min.js"></script>
+</body>
+</html>
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