diff --git a/README.md b/README.md
index 243527b..afb0232 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ See [rec.danmuji.org](https://rec.danmuji.org) (in Chinese)
 
 ## Develop & Getting Started
 
-**Visual Studio 2017 with .NET Core** and **PowerShell** is required. Visual Studio 2019 *could* work but is not tested.
+**Visual Studio 2017 / 2019 with .NET Core** and **PowerShell** is required.
 
 Some file are generated by [PreComplie Script](./CI/patch_buildinfo.ps1). Build project to clear errors shown by Visual Studio.
 
@@ -39,12 +39,6 @@ BililiveRecorder.Core | .NET Standard 2.0
 BililiveRecorder.FlvProcessor | .NET Standard 2.0
 BililiveRecorder.Server | .NET Core 2.0 | TODO
 
-You can start poking around from...
-
-- `BililiveRecorder.WPF/MainWindow.xaml` about WPF gui
-- `BililiveRecorder.Core/Recorder.cs` about core record logic
-- `BililiveRecorder.FlvProcessor/FlvStreamProcessor.cs` about FLV data process
-
 ## Reference & Acknowledgements
 
 - [Adobe Flash Video File Format Specification 10.1.2.01.pdf](https://www.adobe.com/content/dam/acom/en/devnet/flv/video_file_format_spec_v10_1.pdf)
diff --git a/README_CN.md b/README_CN.md
index 00d65ca..353ec3d 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -5,6 +5,7 @@
 [![需要帮助的 issue](https://img.shields.io/github/issues/Bililive/BililiveRecorder/help%20wanted.svg?label=需要帮助的%20issue)](https://github.com/Bililive/BililiveRecorder/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22)
 [![Pull Request Welcome](https://img.shields.io/badge/Pull%20request-欢迎-brightgreen.svg)](#)
 [![开源协议](https://img.shields.io/github/license/Bililive/BililiveRecorder.svg?label=开源协议)](#)
+[<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="112" height="20"><linearGradient id="b" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><clipPath id="a"><rect width="112" height="20" rx="3" fill="#fff"/></clipPath><g clip-path="url(#a)"><path fill="#555" d="M0 0h39v20H0z"/><path fill="#4c1" d="M39 0h73v20H39z"/><path fill="url(#b)" d="M0 0h112v20H0z"/></g><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110"> <text x="205" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="290">QQ群</text><text x="205" y="140" transform="scale(.1)" textLength="290">QQ群</text><text x="745" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="630">689636812</text><text x="745" y="140" transform="scale(.1)" textLength="630">689636812</text></g> </svg>](https://jq.qq.com/?_wv=1027&k=5zVwEyf)
 
 ## 安装 & 使用
 
@@ -24,7 +25,7 @@
 
 开发之前，你需要
 
-- Visual Studio 2017 并安装 .NET Core 开发环境
+- Visual Studio 2017 / 2019 并安装 .NET Core 开发环境
 - PowerShell
 
 项目中有两个文件是由 [编译前脚本](./CI/patch_buildinfo.ps1) 生成的，打开项目后先编译整个项目（执行脚本）可以消除 Visual Studio 给出的错误提醒。