diff --git a/readme.md b/readme.md
index 5cf1edd..868058e 100644
--- a/readme.md
+++ b/readme.md
@@ -5,7 +5,7 @@
 A codebase to understanding frontend development.  
 Including code implemented and study materials gathered by myself.
 
-一个理解前端开发工作的代码库。
+一个理解前端开发工作的代码库。  
 包含我自己实现的代码和整理的学习资源。
 
 ## Why this 为什么
@@ -24,8 +24,9 @@ Because it's the only way to learn how to code -- by practice
     - [ ] useful functions
     - [ ] tricks
     - [ ] polyfills
-  - **tools usage**
-    - [x] [rudux](./redux/)
+  - **JS lib usage**
+    - [x] [react hooks](./react/)
+    - [x] [redux](./redux/)
     - [x] [rxjs](./rxjs/)
     - [ ] Webpack
   - **reimplement**
@@ -41,11 +42,15 @@ Because it's the only way to learn how to code -- by practice
 
 ## Playground Equipment
 
-- [Code Runner](https://marketplace.visualstudio.com/items?itemName=formulahendry.code-runner)
-- [ts-node](https://github.com/TypeStrong/ts-node)
-- [Parcel](https://parceljs.org/)
-- [Create React App](https://github.com/facebook/create-react-app)
-- [Vue CLI](https://cli.vuejs.org/)
+- Chrome Extension
+  - [Octotree](https://chrome.google.com/webstore/detail/octotree/bkhaagjahfmjljalopjnoealnfndnagc)
+- VSCode Extension
+  - [Code Runner](https://marketplace.visualstudio.com/items?itemName=formulahendry.code-runner)
+- Terminal
+  - [ts-node](https://github.com/TypeStrong/ts-node)
+  - [Parcel](https://parceljs.org/)
+  - [Create React App](https://github.com/facebook/create-react-app)
+  - [Vue CLI](https://cli.vuejs.org/)
 
 ## TODO