diff --git a/README.md b/README.md
index f7ee6093..d1e7b710 100644
--- a/README.md
+++ b/README.md
@@ -123,21 +123,21 @@ int main(){
 ### 模版下载与编译
 
 * Overleaf
-  * 下载 [最新版](https://github.com/sjtug/SJTUBeamer/archive/refs/heads/main.zip) 压缩包。
-  * 或下载 [v1.5.0](https://github.com/sjtug/SJTUBeamer/archive/refs/tags/v1.5.0.zip) 压缩包。
+  * 下载开发版压缩包。页面右上角 Code - Download Zip 即可。
+  * 或下载 [最新版](https://github.com/sjtug/SJTUBeamer/releases) 压缩包。点击 “Source Code (zip)” 即可下载。
   * 上传至 Overleaf 使用即可。
   * Overleaf 的设置中需要选择“XeLaTeX”编译器编译。
 * 本地使用
   * 安装 TeXLive 套件。
-  * 下载 [最新版](https://github.com/sjtug/SJTUBeamer/archive/refs/heads/main.zip) 压缩包。
-  * 或下载 [v1.5.0](https://github.com/sjtug/SJTUBeamer/archive/refs/tags/v1.5.0.zip) 压缩包。
-  * 或使用 git 克隆仓库 `git clone https://github.com/sjtug/SJTUBeamer/`。
+  * 使用 git 克隆仓库 `git clone https://github.com/sjtug/SJTUBeamer/`。
+  * 或下载开发版压缩包。页面右上角 Code - Download Zip 即可。
+  * 或下载 [最新版](https://github.com/sjtug/SJTUBeamer/releases) 压缩包。点击 “Source Code (zip)” 即可下载。
   * 之后通过 `latexmk -xelatex main.tex` 命令进行编译即可。
   * VSCode 用户可以使用 LaTeX Workshop 中的 “Recipe: latexmk (latexmkrc)” 进行编译。
 
-目前模版最新的稳定版是 v1.5.0。您可以在 [发布页](https://github.com/sjtug/SJTUBeamer/releases/tag/v1.5.0) 查看修改日志和更多资料。通常来说，SJTUBeamer 的一个稳定版本包括如下内容：
+目前模版最新的稳定版是 v2.0.0。您可以在 [发布页](https://github.com/sjtug/SJTUBeamer/releases) 查看修改日志和更多资料。通常来说，SJTUBeamer 的一个稳定版本包括如下内容：
 
-* `sjtubeamer.pdf`: SJTUBeamer 用户文档。**强烈推荐在使用前阅读一遍 👍👍👍。**
+* `sjtubeamer.pdf`: **强烈推荐在使用前阅读一遍 👍👍👍** SJTUBeamer 用户文档。
 * `sjtubeamerdevguide.pdf`: SJTUBeamer 开发指南。
 * `sjtulib-talk-max-red.pdf`: 示例文档《如何使用 LaTeX 排版论文》的 `max,red` 主题版本。
 * `sjtulib-talk-maxplus-blue.pdf`: 示例文档《如何使用 LaTeX 排版论文》的 `maxplus,blue` 主题版本。
@@ -147,6 +147,8 @@ int main(){
 * `sjtubeamer-ctan.zip`: 包含所有文档和样式的压缩包。
 * SJTUBeamer 源代码。
 
+请使用 Chrome 浏览器或 Adobe Acrobat 打开 SJTUBeamer 用户文档，以避免 pdf 兼容性导致的显示问题。
+
 ## 使用反馈与贡献代码 👷
 
 * 您可以通过 GitHub Issue 反馈使用时碰到的问题。同时，也欢迎您提交 PR 帮助我们改进。
@@ -166,10 +168,10 @@ int main(){
 
 ## 展示 🧐
 
-![cover-0](https://user-images.githubusercontent.com/4198311/131241659-90f0804b-d0b1-4bb9-b45c-7d3c81ace02a.png)
-![cover-1](https://user-images.githubusercontent.com/4198311/131241665-2ced7884-7428-4967-8055-6ce47de7f8bd.png)
-![cover-2](https://user-images.githubusercontent.com/4198311/131241668-cc47d9fb-14c4-4681-b95d-98400e9b8d77.png)
-![cover-3](https://user-images.githubusercontent.com/4198311/131241669-ccf58f17-d35f-492d-8707-2cfdbd613107.png)
+![cover-0](https://user-images.githubusercontent.com/4198311/132097433-3c44d6f6-47e1-4d38-95db-560252ec5817.png)
+![cover-1](https://user-images.githubusercontent.com/4198311/132097442-0994886f-3eb1-4935-a8f5-34f5516fcdc3.png)
+![cover-2](https://user-images.githubusercontent.com/4198311/132097445-6fbfeb22-8e19-4c48-ab1e-ba81672e7ba3.png)
+![cover-3](https://user-images.githubusercontent.com/4198311/132097448-f3c44794-3834-4c4f-8a9a-769098aad8a9.png)
 
 ## 许可证
 
@@ -177,4 +179,4 @@ SJTUBeamer 仓库同时包含 SJTUBeamer 包和一个示例文档。其中内容
 
 * SJTUBeamer 包使用的许可证为 Apache-2.0。
 * SJTUBeamer 示例文档使用 CC-BY-SA 4.0 许可。
-* sjtuvi 和 sjtucover 库及其附属徽标、图片由上海交通大学持有版权。校属各单位及个人以经营为目的使用视觉形象识别系统，须向学校申请使用许可。校外单位及个人未经许可，不得制作或使用载有视觉形象识别系统的物品。
+* sjtuvi 和 sjtucover 库及其附属徽标、图片由上海交通大学持有版权。校属各单位及个人以经营为目的使用视觉形象识别系统，须向学校申请使用许可。校外单位及个人未经许可，不得制作或使用载有视觉形象识别系统的物品。您可以在 [vi.sjtu.edu.cn](https://vi.sjtu.edu.cn/index.php/articles/bulletin/16) 阅读许可协议。
diff --git a/README_en.md b/README_en.md
index 41fe7056..e1a2f24c 100644
--- a/README_en.md
+++ b/README_en.md
@@ -4,32 +4,21 @@ Welcome! 🥳
 
 This is the beamer template exclusively for Shanghai Jiaotong University students to give a speech on group meeting or course project.
 
-## Usage 🧰
-
-For Overleaf users, you can directly download the zip file from github and upload it to https://latex.sjtu.edu.cn to use this template.
-
-If you want to use this template locally, simply download zip file and run `latexmk -xelatex`.
+## Starting Up 👋
 
-## Design Philosophy 💭
+Current document `main.tex` is an example documentation of *How to Use LaTeX to Typeset Thesis*. You could replace the content with the following minimum working example:
 
-To design the template as simple as possible, since everyone can modify it according to their preferences with a little knowledge of LaTeX syntax and beamer.
+<details>
 
-## Contribution 👷
-
-Feel free to file an issue with GitHub Issues. At the same time, PRs are always welcomed.
-
-> After modifying the corresponding source code in src/source, run .github/ci/build_package.sh in bash to build the package and update the sty files.
-> For Windows users, before the next edition of l3build is released, please run
-```cmd
-cd src/source
-latex beamerthemesjtubeamer.ins
-```
-and copy the corresponding files to the correct directory.
+<summary>Expand to show the code block</summary>
 
-## Test Version
-
-You could get different styles from the following keywords.
 ```latex
+\documentclass[
+    % draft,          % draft mode
+    aspectratio=169,  % use 16:9 ratio 
+]{beamer}
+\mode<presentation>
+
 \usetheme[maxplus]{sjtubeamer}
 % use maxplus/max/min to change covers.
 % use red/blue to change main color.
@@ -39,22 +28,149 @@ You could get different styles from the following keywords.
 %   default    smoothbars split	 
 %   shadow     tree       smoothtree
 % *siderbar is recommended to be used with max option.
+
+\usepackage{biblatex}
+\addbibresource{thesis.bib}
+
+\institute[SJTUG]{Shanghai Jiao Tong University *nix User Group}
+
+\title{SJTUBeamer}
+\subtitle{A Beamer Template}
+\author{SJTUG}
+\date{\today} 
+
+\begin{document}
+
+\maketitle
+
+\part{Intro}
+
+\AtBeginSection[]{
+  \begin{frame}          
+    \sectionpage
+  \end{frame}
+}
+
+\section{Basics}
+
+\begin{frame}
+  \frametitle{Title}
+  \paragraph{List} This \alert{slide} contains the following items:
+  \begin{itemize}
+    \item Item 1
+    \item Item 2
+    \item Item 3
+  \end{itemize}
+\end{frame}
+
+\begin{frame}
+  \frametitle{Title}
+  \framesubtitle{Subtitle}
+  \begin{equation}
+    x^2+2x+1=(x+1)^2
+  \end{equation}
+\end{frame}
+
+\section{Blocks}
+\begin{frame}
+  \frametitle{Some boxes}
+  \begin{block}{block}
+    This is a box.
+    % \cite{<thelegendofjiang>}
+  \end{block}
+  \begin{alertblock}{alertblock}
+    Text.
+  \end{alertblock}
+  \begin{exampleblock}{exampleblock}
+    Text.
+  \end{exampleblock}
+\end{frame}
+
+\begin{frame}[fragile]          % fragile 
+  \frametitle{codeblock}
+  \begin{codeblock}[language=c++]{C++ Code}
+#include<iostream>
+
+int main(){
+  // Console Output
+  std::cout << "Hello, SJTU!" << std::endl;
+  return 0;
+}
+  \end{codeblock}
+\end{frame}
+
+\part{Bibliography}
+\begin{frame}[allowframebreaks]
+  \printbibliography
+\end{frame}
+
+\makebottom       % create the bottom page
+
+\end{document}
 ```
 
-## Appearance 🧐
+</details>
 
-**Blue theme cover page**
+## Usage 🧰
 
-![page001](https://user-images.githubusercontent.com/4198311/119085675-be619a80-ba36-11eb-878f-609b2882dc35.png)
+Edit `main.tex` and start to use.
 
-**Red theme cover page**
+### Template Download & Compilation
 
-![page001](https://user-images.githubusercontent.com/4198311/119085697-c7526c00-ba36-11eb-8a70-296f8f36c2d6.png)
+* Overleaf
+  * Download the development version by clicking "Code - Download Zip".
+  * Or download [the latest version](https://github.com/sjtug/SJTUBeamer/releases). Click "Source Code (zip)" to download.
+  * Upload to Overleaf.
+  * Set to "XeLaTeX" for compilation.
+* Local Use
+  * Install TeXLive.
+  * Run `git clone https://github.com/sjtug/SJTUBeamer/`.
+  * Or download the development version by clicking "Code - Download Zip".
+  * Or download [the latest version](https://github.com/sjtug/SJTUBeamer/releases). Click "Source Code (zip)" to download.
+  * Run `latexmk -xelatex main.tex` to compile
+  * VSCode LaTeX Workshop: use “Recipe: latexmk (latexmkrc)” to compile
+
+The current stable version is v2.0.0。You could visit [the release page](https://github.com/sjtug/SJTUBeamer/releases) for the changelog and more details. Generally speaking, a release of SJTUBeamer has the following content:
+
+* `sjtubeamer.pdf`: SJTUBeamer User Guide。**HIGHLY RECOMMENDED TO READ BEFORE YOU START👍👍👍**
+* `sjtubeamerdevguide.pdf`: SJTUBeamer Development Guide.
+* `sjtulib-talk-max-red.pdf`: `max,red` version of `main.tex`.
+* `sjtulib-talk-maxplus-blue.pdf`: `maxplus,blue` version of `main.tex`.
+* `sjtulib-talk-maxplus-red.pdf`: `maxplus,red` version of `main.tex`.
+* `sjtulib-talk-min-red.pdf`: `min,red` version of `main.tex`.
+* `sample-all-covers.pdf`: all covers (title page and bottom page).
+* `sjtubeamer-ctan.zip`: the installation package.
+* SJTUBeamer source code.
+
+Please use Chrome browser or Adobe Acrobat to open user guide, otherwise there could be display issues.
+
+## Feedback & Contribution 👷
+
+* Feel free to file an issue with GitHub Issues. At the same time, PRs are always welcomed.
+* The source code should be modified in `.dtx` files. Then use l3build to generate sty files.
+* You could get more implementation details in `sjtubeamerdevguide.pdf`.
+
+The development process is as follows:
+
+* Modify `.dtx` files.
+* Run `make generate` and copy the style file to the root.
+* Update `main.tex`, and run `make build` for previewing modification.
+* Update dev guide, and run `make build-dev` ro compile the doc and run tests.
+* (Optional) Run `make format-dev` to format all the files.
+* Submit a Pull Request.
+
+New contributors could add your name to the developer list in `sjtubeamerdevguide.tex`.
+
+## Appearance 🧐
 
-**Normal cover page**
+![cover-0](https://user-images.githubusercontent.com/4198311/132097433-3c44d6f6-47e1-4d38-95db-560252ec5817.png)
+![cover-1](https://user-images.githubusercontent.com/4198311/132097442-0994886f-3eb1-4935-a8f5-34f5516fcdc3.png)
+![cover-2](https://user-images.githubusercontent.com/4198311/132097445-6fbfeb22-8e19-4c48-ab1e-ba81672e7ba3.png)
+![cover-3](https://user-images.githubusercontent.com/4198311/132097448-f3c44794-3834-4c4f-8a9a-769098aad8a9.png)
 
-![page001](https://user-images.githubusercontent.com/4198311/118810621-aa0a8a00-b8de-11eb-907e-6342c156ea53.png)
+## License
 
-**Red theme slides**
 
-![page004](https://user-images.githubusercontent.com/4198311/118810609-a70f9980-b8de-11eb-84b3-68918c905817.png)
+* SJTUBeamer is licensed under Apache-2.0.
+* SJTUBeamer is licensed under CC-BY-SA 4.0.
+* sjtuvi and sjtucover library and related graphics is under [No commercial](https://vi.sjtu.edu.cn/index.php/articles/bulletin/16).
diff --git a/src/doc/cover.tex b/src/doc/cover.tex
index 326411da..572b15ad 100644
--- a/src/doc/cover.tex
+++ b/src/doc/cover.tex
@@ -2,8 +2,8 @@
 \usepackage{pdfpages}
 \includepdfset{fitpaper=true,pages=1-last}
 \begin{document}
-\includepdf{cover-red-dark.pdf}
-\includepdf{cover-red-light.pdf}
-\includepdf{cover-blue-dark.pdf}
-\includepdf{cover-blue-light.pdf}
+\includepdf[nup=3x3,frame=true]{cover-red-dark.pdf}
+\includepdf[nup=3x3,frame=true]{cover-red-light.pdf}
+\includepdf[nup=3x3,frame=true]{cover-blue-dark.pdf}
+\includepdf[nup=3x3,frame=true]{cover-blue-light.pdf}
 \end{document}