update readme.md

Readme.md

@@ -9,12 +9,20 @@ Greetings and welcome to `exercise.rs`， If you have the following problems:
 
 Then you have come to a right place: here you can find a bunch of easy to hard exercises to improve your Rust skills，this will help you fill the gap of easy-to-learn and hard-to-use.
 
-
 ## Online Reading
 This book is written in English and Chinese, you can pick up the language you are familiar with:
 - English: [https://exercise.rs](https://exercise.rs)
 - 简体中文: [https://zh.exercise.rs](https://zh.exercise.rs)
 
+## About exercises
+- difficulty level: easy: 🌟  medium: 🌟🌟 hard: 🌟🌟🌟  hell: 🌟🌟🌟🌟
+- Everything is online: reading, editing, testing 
+
+## Contributing
+We welcome all kinds of contributors, especially ones who has precious exercises.
+
+Every exercise you have contributed will be annotated with your nickname and personal link, it's time to show yourself to the world!
+
 ## Learning Rust
 If you are a first-time Rust learner, here are some high quality learning resources :
 - [The Book](https://doc.rust-lang.org/book/index.html) for English  speakers

en/src/circle-refer

@@ -1 +0,0 @@
-# Weak and Circle reference

en/src/crate

@@ -1 +0,0 @@
-# Crate

en/src/resu

@@ -1 +0,0 @@
-# panic!

en/src/why-exercise.md

@@ -1 +1,39 @@
 # Why Exercise.rs
+> 中文版 [传送门](https://zh.exercise.rs)
+
+Greetings and welcome to `exercise.rs`， If you have the following problems: 
+
+- After learning some rust knowledge, you want to take a step:  do some exercises, but found unchallenging ones
+- Found nothing about rust toolchains, std, ascyn/.await topics
+- Still have no idea of what to do next, maybe you tried writing a demo /project, but... not that good or even worse: failed
+
+Then you have come to a right place: here you can find a bunch of easy to hard exercises to improve your Rust skills，this will help you fill the gap of easy-to-learn and hard-to-use.
+
+## About exercises
+- difficulty level: easy: 🌟  medium: 🌟🌟 hard: 🌟🌟🌟  hell: 🌟🌟🌟🌟
+- Everything is online: reading, editing, testing 
+  
+## Contributing
+We welcome all kinds of contributors, especially ones who has precious exercises.
+
+Every exercise you have contributed will be annotated with your nickname and personal link, it's time to show yourself to the world!
+
+## Learning Rust
+If you are a first-time Rust learner, here are some high quality learning resources :
+- [The Book](https://doc.rust-lang.org/book/index.html) for English  speakers
+- [Rust语言圣经(The Course)](https://course.rs) for Chinese speakers, it covers nearly all the topics in Rust
+
+
+## difference to rustlings
+[Rustlings](https://github.com/rust-lang/rustlings) only contains small and easy exercises for junior rust devs. There is a big gap between learning Rust and using it in your projects.
+
+Another limit for rustlings is that you have to download rustlings to local machine and compile it first before starting to learn.
+
+## difference to rust by example
+[Rust By Example](https://doc.rust-lang.org/stable/rust-by-example/) is an excellent online book for learning Rust，`exercise.rs` has some small advantages in :
+
+- more topics and exercises，specially for the hard part of Rust，e.g lifetime、smart pointers、threads 、async/.await etc
+- difficulty from easy to hard，it will minimize the gap between learning and using in projects
+- up-to-date, e.g features which added in Rust 1.58 also have the corresponding exercises in `exercise.rs`
+- Both `course.rs` and `exercise.rs` are designed according to the CS courses in college，so quliaty is the most important factor
+

zh-CN/Readme.md

@@ -12,6 +12,13 @@
 - English: [https://exercise.rs](https://exercise.rs)
 - 简体中文: [https://zh.exercise.rs](https://zh.exercise.rs)
 
+## 关于练习题的说明
+- 难度等级: 简单: 🌟  中等: 🌟🌟  困难: 🌟🌟🌟  地狱: 🌟🌟🌟🌟
+- 一切都在线化： 阅读、编辑和测试代码，当然还包括错误提示
+
+## 欢迎你，贡献者
+本项目欢迎一切贡献者，特别是怀揣题库的兄弟，你所贡献的每一道题都会注明你的昵称和个人链接，是时候让全世界看看咱的风采了。
+
 ## 学习 Rust 语言
 我们强烈推荐在开始做练习之前，先看看 [<<Rust语言圣经>>]((https://course.rs)) 这本书，它覆盖了从入门到精通所需的全部知识，相信我，里面绝对有你所需要的 Rust 知识。
 
@@ -33,5 +40,3 @@
 - 跟随 Rust 版本实时更新,
 - `course.rs` 和 `exercise.rs` 看域名就知道，它非常有信心才敢使用这两个针对性如此之强的域名，而信心来源于**高质量**
 
-
-

zh-CN/assets/CNAME

@@ -1 +1 @@
-exercise.rs
+zh.exercise.rs

zh-CN/deploy

@@ -15,7 +15,7 @@ git config user.email "cto@188.com"
 git add .
 git commit -m 'deploy'
 git branch -M gh-pages
-git remote add origin https://github.com/sunface/rust-exercise
+git remote add origin https://github.com/sunface/zh.exercise.rs
 
 ## push to github pages
 git push -u -f origin gh-pages

zh-CN/src/why-exercise.md

@@ -1 +1,46 @@
 # Why Exercise.rs
+> 英文版 [传送门](https://exercise.rs)
+
+欢迎大家来到 `exercise.rs`，在来到这里之前不知道你有没有碰到过以下问题:
+
+- 学完知识，想要针对性的练习，但是只能找到一些不痛不痒的习题
+- 一些 Rust 工具、标准库等相关的习题更是一个都找不到
+- 做完了习题还是一片茫然，不知道下一步该做什么，上手写项目吧，发现几乎无处下手
+
+如果你曾经和我有一样的问题，那来到这里就对了：**在这里你能找到大量从简单到困难的 Rust 练习题，不仅能针对性巩固你所学过的知识，解决 Rust 语言难以上手应用的问题**。
+
+## 在线阅读
+本书同时提供了中文和英文版本:
+- English: [https://exercise.rs](https://exercise.rs)
+- 简体中文: [https://zh.exercise.rs](https://zh.exercise.rs)
+
+## 关于练习题的说明
+- 难度等级: 简单: 🌟  中等: 🌟🌟  困难: 🌟🌟🌟  地狱: 🌟🌟🌟🌟
+- 一切都在线化： 阅读、编辑和测试代码，当然还包括错误提示
+
+## 欢迎你，贡献者
+本项目欢迎一切贡献者，特别是怀揣题库的兄弟，你所贡献的每一道题都会注明你的昵称和个人链接，是时候让全世界看看咱的风采了。
+
+## 学习 Rust 语言
+我们强烈推荐在开始做练习之前，先看看 [<<Rust语言圣经>>]((https://course.rs)) 这本书，它覆盖了从入门到精通所需的全部知识，相信我，里面绝对有你所需要的 Rust 知识。
+
+(悄咪咪的告诉咱中国用户， `exercise.rs` 章节目录和 <<Rust语言圣经>> 完全相同，大家猜猜为什么)
+
+
+
+
+## 对比 rustlings
+[Rustlings](https://github.com/rust-lang/rustlings) 只包含了一些小型的、简单的练习题，说实话并不能帮你熟悉学到的 Rust 知识，更别提帮你打通从学习到实践的道路了。
+
+另一个问题就是 rustlings 需要先下载到本地，然后编译运行，无法在线使用。
+
+## 对比 Rust By Example
+[Rust By Example](https://doc.rust-lang.org/stable/rust-by-example/) 是相当不错的在线练习题，相比之前，`exercise.rs` 拥有以下优势 :
+
+- 内容覆盖面更广，且练习题更多、针对性更强，充分满足大家做题的快乐
+- 难度从简单到困难都有，且更贴合实际
+- 跟随 Rust 版本实时更新,
+- `course.rs` 和 `exercise.rs` 看域名就知道，它非常有信心才敢使用这两个针对性如此之强的域名，而信心来源于**高质量**
+
+
+