diff --git a/README.en.md b/README.en.md
index 4610f24a..08ae0e73 100644
--- a/README.en.md
+++ b/README.en.md
@@ -1,32 +1,23 @@
-<p style="text-align:center">
-<a href="https://github.com/Snailclimb/JavaGuide" target="_blank">
-	<img src="https://oss.javaguide.cn/github/javaguide/csdn/1c00413c65d1995993bf2b0daf7b4f03.png" width=""/>
-</a>
-</p>
-<p style="text-align:center">
-  <a href="https://javaguide.cn/"><img src="https://img.shields.io/badge/阅读-read-brightgreen.svg" alt="阅读"></a>
-  <img src="https://img.shields.io/github/stars/Snailclimb/JavaGuide" alt="stars"/>
-  <img src="https://img.shields.io/github/forks/Snailclimb/JavaGuide" alt="forks"/>
-  <img src="https://img.shields.io/github/issues/Snailclimb/JavaGuide" alt="issues"/>
-</p>
-<h3 style="text-align:center">Recommended</h3>
-<table>
-  <tbody>
-    <tr>
-       <td style="text-align:center" valign="middle">
-        <a href="https://sourl.cn/e7ee87">
-         <img src="https://oss.javaguide.cn/xingqiu/xingqiu.png" style="margin: 0 auto;width:850px" /></a>
-      </td>       
-    </tr>
-  </tbody>
-</table>
+<div style="text-align:center">
 
+[![logo](https://oss.javaguide.cn/github/javaguide/csdn/1c00413c65d1995993bf2b0daf7b4f03.png)](https://github.com/Snailclimb/JavaGuide)
+
+[![阅读](https://img.shields.io/badge/阅读-read-brightgreen.svg)](https://javaguide.cn/)
+![Stars](https://img.shields.io/github/stars/Snailclimb/JavaGuide)
+![forks](https://img.shields.io/github/forks/Snailclimb/JavaGuide)
+![issues](https://img.shields.io/github/issues/Snailclimb/JavaGuide)
+
+### Recommended
+
+[<img src="https://oss.javaguide.cn/xingqiu/xingqiu.png" style="width:850px;margin: 0 auto" />](https://sourl.cn/e7ee87)
+
+</div>
 
 ## Java
 
 ### Basis
 
-**Knowledge points/interview questions**: (Must see:+1: ): 
+**Knowledge points/interview questions**: (Must see:+1: ):
 
 - [Java Basics Knowledge Points/Interview Questions Summary(1)](docs/java/basis/java-basic-questions-01.md)
 - [Java Basics Knowledge Points/Interview Questions Summary(2)](docs/java/basis/java-basic-questions-01.md)
@@ -45,8 +36,8 @@
 1. **[Java collection FAQ summary](docs/java/collection/java集合框架基础知识&面试题总结.md)** (must see :+1:)
 2. [Summary of considerations for using Java containers](docs/java/collection/java集合使用注意事项.md)
 3. **source code analysis** : [ArrayList source code + expansion mechanism analysis](docs/java/collection/arraylist-source-code.md),
-[HashMap(JDK1.8) source code + underlying data structure analysis](docs/java/collection/ hashmap-source-code.md), 
-[ConcurrentHashMap source code + underlying data structure analysis](docs/java/collection/concurrent-hash-map-source-code.md)
+   [HashMap(JDK1.8) source code + underlying data structure analysis](docs/java/collection/ hashmap-source-code.md),
+   [ConcurrentHashMap source code + underlying data structure analysis](docs/java/collection/concurrent-hash-map-source-code.md)
 
 ### Concurrency
 
@@ -87,7 +78,6 @@ This part of JVM mainly refers to [JVM Virtual Machine Specification-Java8 ](htt
 1. [JAD decompile](docs/java/tips/JAD反编译tricks.md)
 2. [Handy for locating common Java performance problems](./docs/java/tips/locate-performance-problems/手把手教你定位常见Java性能问题.md)
 
-
 ## Computer Basics
 
 👉 **[Illustrated Computer Fundamentals PDF Download](https://mp.weixin.qq.com/s?__biz=Mzg2OTA0Njk0OA==&mid=100021725&idx=1&sn=2db9664ca25363139a81691043e9fd8f&chksm=4ea19a1679d61300d8990f7e43bfc7f476577a81b712cf0f9c6f6552a8b219bc081efddb5c54#rd)** .
@@ -110,19 +100,18 @@ This part of JVM mainly refers to [JVM Virtual Machine Specification-Java8 ](htt
 1. [Linear data structure :array, chain table, stack, queue](docs/cs-basics/data-structure/线性数据结构.md)
 2. [diagram](docs/cs-basics/data-structure/图.md)
 3. [heap](docs/cs-basics/data-structure/堆.md)
-4. [tree](docs/cs-basics/data-structure/树.md) : focus on [red-black-tree](docs/cs-basics/data-structure/红黑树.md), B-, B+, B* tree, LSM tree
+4. [tree](docs/cs-basics/data-structure/树.md) : focus on [red-black-tree](docs/cs-basics/data-structure/红黑树.md), B-, B+, B\* tree, LSM tree
 
 Other common data structures : 1.
 
 1. [Bloom filter](docs/cs-basics/data-structure/bloom-filter.md)
 
-
 ### Algorithm
 
 This part of the algorithm is very important, if you do not know how to learn the algorithm, you can look at what I wrote.
 
 - [Recommended Algorithm Learning Books + Resources](https://www.zhihu.com/question/323359308/answer/1545320858) 。
-- [如何刷Leetcode?](https://www.zhihu.com/question/31092580/answer/1534887374) 
+- [如何刷 Leetcode?](https://www.zhihu.com/question/31092580/answer/1534887374)
 
 **Summary of common algorithm problems** :
 
@@ -130,7 +119,7 @@ This part of the algorithm is very important, if you do not know how to learn th
 - [Summary of several common algorithm problems of the chain table ](docs/cs-basics/algorithms/几道常见的链表算法题.md)
 - [Link offer some programming questions](docs/cs-basics/algorithms/剑指offer部分编程题.md)
 
-In addition，[GeeksforGeeks]( https://www.geeksforgeeks.org/fundamentals-of-algorithms/) This site summarizes the common algorithms, which are more comprehensive and systematic.
+In addition，[GeeksforGeeks](https://www.geeksforgeeks.org/fundamentals-of-algorithms/) This site summarizes the common algorithms, which are more comprehensive and systematic.
 
 ## Database
 
@@ -140,7 +129,7 @@ In addition，[GeeksforGeeks]( https://www.geeksforgeeks.org/fundamentals-of-alg
 
 1. [Database Basics Summary](docs/database/数据库基础知识.md)
 2. **[MySQL Knowledge Summary](docs/database/mysql/mysql知识点&面试题总结.md)** (Must see:+1:)
-5. [MySQL High Performance Optimization Specification Recommendations](docs/database/mysql/mysql-high-performance-optimization-specification-recommendations.md)
+3. [MySQL High Performance Optimization Specification Recommendations](docs/database/mysql/mysql-high-performance-optimization-specification-recommendations.md)
 
 **Important knowledge points:**
 
@@ -182,15 +171,15 @@ If you have not touched Java Web development, you can first look at my summary o
 
 #### Spring/SpringBoot (must see :+1:)
 
-**Knowledge/Interview Questions:** 
+**Knowledge/Interview Questions:**
 
 1. **[Spring FAQ Summary](docs/system-design/framework/spring/Spring常见问题总结.md)**
 2. **[SpringBoot Getting Started Guide](https://github.com/Snailclimb/springboot-guide)**
 
 **Important Knowledge Points Explained:** 1.
 
-1. **[Spring/Spring Boot common annotations summary! Arrangement!](./docs/system-design/framework/spring/Spring&SpringBoot常用注解总结.md)** 
-2. **[Spring Transaction Summary](docs/system-design/framework/spring/Spring事务总结.md)** 
+1. **[Spring/Spring Boot common annotations summary! Arrangement!](./docs/system-design/framework/spring/Spring&SpringBoot常用注解总结.md)**
+2. **[Spring Transaction Summary](docs/system-design/framework/spring/Spring事务总结.md)**
 3. [What design patterns are used in Spring?](docs/system-design/framework/spring/Spring设计模式总结.md)
 4. **[SpringBoot auto-assembly principle?"](docs/system-design/framework/spring/SpringBoot自动装配原理.md)**
 
@@ -205,6 +194,7 @@ If you have not touched Java Web development, you can first look at my summary o
 **[Fundamentals of Certification Authorization](docs/system-design/security/basis-of-authority-certification.md)** In this article I will introduce the common concepts of authentication and authorization: **Authentication**, **Authorization** and **Cookie**, **Session**, Token, **OAuth 2**, **SSO**. If you are not clear about these concepts, we suggest you read this article properly.
 
 - **JWT** : JWT (JSON Web Token) is a form of authentication, where a JWT is essentially a signed piece of data in JSON format. Since it is signed, the recipient can verify its authenticity. Related reading.
+
   - [JWT Pros and Cons Analysis and Solutions to Common Problems](docs/system-design/security/jwt优缺点分析以及常见问题解决方案.md)
   - [Demo for beginners to get started with Spring Security With JWT](https://github.com/Snailclimb/spring-security-jwt-guide)
 
@@ -212,7 +202,7 @@ If you have not touched Java Web development, you can first look at my summary o
 
 #### Data Desensitization
 
-Data desensitization means that we deform sensitive information data according to specific rules, for example, we replace certain digits of cell phone numbers and ID numbers with *.
+Data desensitization means that we deform sensitive information data according to specific rules, for example, we replace certain digits of cell phone numbers and ID numbers with \*.
 
 ### Timed tasks
 
diff --git a/README.md b/README.md
index a8c86512..84321d7a 100755
--- a/README.md
+++ b/README.md
@@ -1,46 +1,37 @@
 推荐你通过在线阅读网站进行阅读，体验更好，速度更快！
 
-* **[JavaGuide 在线阅读网站（新版，推荐👍）](https://javaguide.cn/)**
-* [JavaGuide 在线阅读版（老版）](https://snailclimb.gitee.io/javaguide/#/)
+- **[JavaGuide 在线阅读网站（新版，推荐 👍）](https://javaguide.cn/)**
+- [JavaGuide 在线阅读版（老版）](https://snailclimb.gitee.io/javaguide/#/)
+
+[<img src="https://oss.javaguide.cn/xingqiu/xingqiu.png" style="width:850px;margin: 0 auto" />](https://sourl.cn/e7ee87)
+
+<div style="text-align:center">
+
+[![logo](https://oss.javaguide.cn/github/javaguide/csdn/1c00413c65d1995993bf2b0daf7b4f03.png)](https://github.com/Snailclimb/JavaGuide)
+
+[![阅读](https://img.shields.io/badge/阅读-read-brightgreen.svg)](https://javaguide.cn/)
+![Stars](https://img.shields.io/github/stars/Snailclimb/JavaGuide)
+![forks](https://img.shields.io/github/forks/Snailclimb/JavaGuide)
+![issues](https://img.shields.io/github/issues/Snailclimb/JavaGuide)
+
+[GitHub](https://github.com/Snailclimb/JavaGuide) | [Gitee](https://gitee.com/SnailClimb/JavaGuide)
 
-<div align="center">
-    <p>
-        <a href="https://javaguide.cn/about-the-author/zhishixingqiu-two-years.html">
-            <img src="https://oss.javaguide.cn/xingqiu/xingqiu.png" style="margin: 0 auto; width: 850px;" />
-        </a>
-    </p>
-    <p>
-        <a href="https://github.com/Snailclimb/JavaGuide" target="_blank">
-            <img src="https://oss.javaguide.cn/github/javaguide/csdn/1c00413c65d1995993bf2b0daf7b4f03.png" width="" />
-        </a>
-    </p>
-    <p>
-        <a href="https://javaguide.cn/"><img src="https://img.shields.io/badge/阅读-read-brightgreen.svg" alt="阅读" /></a>
-        <img src="https://img.shields.io/github/stars/Snailclimb/JavaGuide" alt="stars" />
-        <img src="https://img.shields.io/github/forks/Snailclimb/JavaGuide" alt="forks" />
-        <img src="https://img.shields.io/github/issues/Snailclimb/JavaGuide" alt="issues" />
-    </p>
-    <p>
-        <a href="https://github.com/Snailclimb/JavaGuide">Github</a> |
-        <a href="https://gitee.com/SnailClimb/JavaGuide">Gitee</a>
-    </p>  
 </div>
 
-
 > 1. **面试专版** ：准备面试的小伙伴可以考虑面试专版：[《Java 面试指北 》](https://javaguide.cn/zhuanlan/java-mian-shi-zhi-bei.html) (质量很高，专为面试打造，配合 JavaGuide 食用)。
 > 1. **知识星球** ：专属面试小册/一对一交流/简历修改/专属求职指南，欢迎加入 [JavaGuide 知识星球](https://javaguide.cn/about-the-author/zhishixingqiu-two-years.html)（点击链接即可查看星球的详细介绍，一定一定一定确定自己真的需要再加入，一定一定要看完详细介绍之后再加我）。
-> 2. **转载须知** ：以下所有文章如非文首说明为转载皆为我（Guide 哥）的原创，转载在文首注明出处，如发现恶意抄袭/搬运，会动用法律武器维护自己的权益。让我们一起维护一个良好的技术创作环境！
+> 1. **转载须知** ：以下所有文章如非文首说明为转载皆为我（Guide 哥）的原创，转载在文首注明出处，如发现恶意抄袭/搬运，会动用法律武器维护自己的权益。让我们一起维护一个良好的技术创作环境！
 
-<div align="center">   
-    <img src="https://oss.javaguide.cn/github/javaguide/gongzhonghaoxuanchuan.png" style="margin: 0 auto;" />  
+<div style="text-align:center">
+  <img src="https://oss.javaguide.cn/github/javaguide/gongzhonghaoxuanchuan.png" style="margin: 0 auto;" />  
 </div>
 
 ## 项目相关
 
-* [项目介绍](./docs/javaguide/intro.md)
-* [贡献指南](./docs/javaguide/contribution-guideline.md)
-* [常见问题](./docs/javaguide/faq.md)
-* [项目待办](./docs/javaguide/todo.md)
+- [项目介绍](./docs/javaguide/intro.md)
+- [贡献指南](./docs/javaguide/contribution-guideline.md)
+- [常见问题](./docs/javaguide/faq.md)
+- [项目待办](./docs/javaguide/todo.md)
 
 ## Java
 
@@ -74,15 +65,15 @@
 
 **源码分析** ：
 
-* [ArrayList 源码+扩容机制分析](./docs/java/collection/arraylist-source-code.md)
-* [HashMap(JDK1.8)源码+底层数据结构分析](./docs/java/collection/hashmap-source-code.md)
-* [ConcurrentHashMap 源码+底层数据结构分析](./docs/java/collection/concurrent-hash-map-source-code.md)
+- [ArrayList 源码+扩容机制分析](./docs/java/collection/arraylist-source-code.md)
+- [HashMap(JDK1.8)源码+底层数据结构分析](./docs/java/collection/hashmap-source-code.md)
+- [ConcurrentHashMap 源码+底层数据结构分析](./docs/java/collection/concurrent-hash-map-source-code.md)
 
 ### IO
 
-* [IO 基础知识总结](./docs/java/io/io-basis.md)
-* [IO 设计模式总结](./docs/java/io/io-design-patterns.md)
-* [IO 模型详解](./docs/java/io/io-model.md)
+- [IO 基础知识总结](./docs/java/io/io-basis.md)
+- [IO 设计模式总结](./docs/java/io/io-design-patterns.md)
+- [IO 模型详解](./docs/java/io/io-model.md)
 
 ### 并发
 
@@ -100,11 +91,11 @@
 - [Java 并发容器总结](./docs/java/concurrent/java-concurrent-collections.md)
 - [Atomic 原子类总结](./docs/java/concurrent/atomic-classes.md)
 - [AQS 详解](./docs/java/concurrent/aqs.md)
-- [CompletableFuture详解](./docs/java/concurrent/completablefuture-intro.md)
+- [CompletableFuture 详解](./docs/java/concurrent/completablefuture-intro.md)
 
 ### JVM (必看 :+1:)
 
-JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle.com/javase/specs/jvms/se8/html/index.html) 和周志明老师的[《深入理解Java虚拟机（第3版）》](https://book.douban.com/subject/34907497/) （强烈建议阅读多遍！）。
+JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle.com/javase/specs/jvms/se8/html/index.html) 和周志明老师的[《深入理解 Java 虚拟机（第 3 版）》](https://book.douban.com/subject/34907497/) （强烈建议阅读多遍！）。
 
 - **[Java 内存区域](./docs/java/jvm/memory-area.md)**
 - **[JVM 垃圾回收](./docs/java/jvm/jvm-garbage-collection.md)**
@@ -117,7 +108,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 ### 新特性
 
-- **Java 8** ：[Java 8 新特性总结（翻译）](./docs/java/new-features/java8-tutorial-translate.md)、[Java8常用新特性总结](./docs/java/new-features/java8-common-new-features.md)
+- **Java 8** ：[Java 8 新特性总结（翻译）](./docs/java/new-features/java8-tutorial-translate.md)、[Java8 常用新特性总结](./docs/java/new-features/java8-common-new-features.md)
 - [Java 9 新特性概览](./docs/java/new-features/java9.md)
 - [Java 10 新特性概览](./docs/java/new-features/java10.md)
 - [Java 11 新特性概览](./docs/java/new-features/java11.md)
@@ -166,7 +157,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 - [线性数据结构 :数组、链表、栈、队列](./docs/cs-basics/data-structure/linear-data-structure.md)
 - [图](./docs/cs-basics/data-structure/graph.md)
 - [堆](./docs/cs-basics/data-structure/heap.md)
-- [树](./docs/cs-basics/data-structure/tree.md) ：重点关注[红黑树](./docs/cs-basics/data-structure/red-black-tree.md)、B-，B+，B*树、LSM树
+- [树](./docs/cs-basics/data-structure/tree.md) ：重点关注[红黑树](./docs/cs-basics/data-structure/red-black-tree.md)、B-，B+，B\*树、LSM 树
 
 其他常用数据结构 ：
 
@@ -176,17 +167,17 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 算法这部分内容非常重要，如果你不知道如何学习算法的话，可以看下我写的：
 
-* [算法学习书籍+资源推荐](https://www.zhihu.com/question/323359308/answer/1545320858) 。
-* [如何刷Leetcode?](https://www.zhihu.com/question/31092580/answer/1534887374) 
+- [算法学习书籍+资源推荐](https://www.zhihu.com/question/323359308/answer/1545320858) 。
+- [如何刷 Leetcode?](https://www.zhihu.com/question/31092580/answer/1534887374)
 
 **常见算法问题总结** ：
 
-* [几道常见的字符串算法题总结 ](./docs/cs-basics/algorithms/string-algorithm-problems.md)
-* [几道常见的链表算法题总结 ](./docs/cs-basics/algorithms/linkedlist-algorithm-problems.md)
-* [剑指 offer 部分编程题](./docs/cs-basics/algorithms/the-sword-refers-to-offer.md)
-* [十大经典排序算法](./docs/cs-basics/algorithms/10-classical-sorting-algorithms.md)
+- [几道常见的字符串算法题总结 ](./docs/cs-basics/algorithms/string-algorithm-problems.md)
+- [几道常见的链表算法题总结 ](./docs/cs-basics/algorithms/linkedlist-algorithm-problems.md)
+- [剑指 offer 部分编程题](./docs/cs-basics/algorithms/the-sword-refers-to-offer.md)
+- [十大经典排序算法](./docs/cs-basics/algorithms/10-classical-sorting-algorithms.md)
 
-另外，[GeeksforGeeks]( https://www.geeksforgeeks.org/fundamentals-of-algorithms/) 这个网站总结了常见的算法 ，比较全面系统。
+另外，[GeeksforGeeks](https://www.geeksforgeeks.org/fundamentals-of-algorithms/) 这个网站总结了常见的算法 ，比较全面系统。
 
 ## 数据库
 
@@ -196,9 +187,8 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 - [NoSQL 基础知识总结](./docs/database/nosql.md)
 - [字符集详解](./docs/database/character-set.md)
 - SQL :
-  - [SQL语法基础知识总结](./docs/database/sql/sql-syntax-summary.md)
-  - [SQL常见面试题总结](./docs/database/sql/sql-questions-01.md)
-
+  - [SQL 语法基础知识总结](./docs/database/sql/sql-syntax-summary.md)
+  - [SQL 常见面试题总结](./docs/database/sql/sql-questions-01.md)
 
 ### MySQL
 
@@ -209,14 +199,14 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 **重要知识点：**
 
-- [MySQL索引详解](./docs/database/mysql/mysql-index.md)
-- [MySQL事务隔离级别图文详解)](./docs/database/mysql/transaction-isolation-level.md)
-- [MySQL三大日志(binlog、redo log和undo log)详解](./docs/database/mysql/mysql-logs.md)
+- [MySQL 索引详解](./docs/database/mysql/mysql-index.md)
+- [MySQL 事务隔离级别图文详解)](./docs/database/mysql/transaction-isolation-level.md)
+- [MySQL 三大日志(binlog、redo log 和 undo log)详解](./docs/database/mysql/mysql-logs.md)
 - [InnoDB 存储引擎对 MVCC 的实现](./docs/database/mysql/innodb-implementation-of-mvcc.md)
 - [SQL 语句在 MySQL 中的执行过程](./docs/database/mysql/how-sql-executed-in-mysql.md)
 - [MySQL 查询缓存详解](./docs/database/mysql/mysql-query-cache.md)
-- [MySQL执行计划分析](./docs/database/mysql/mysql-query-execution-plan.md)
-- [MySQL自增主键一定是连续的吗](./docs/database/mysql/mysql-auto-increment-primary-key-continuous.md)
+- [MySQL 执行计划分析](./docs/database/mysql/mysql-query-execution-plan.md)
+- [MySQL 自增主键一定是连续的吗](./docs/database/mysql/mysql-auto-increment-primary-key-continuous.md)
 - [MySQL 时间类型数据存储建议](./docs/database/mysql/some-thoughts-on-database-storage-time.md)
 - [MySQL 隐式转换造成索引失效](./docs/database/mysql/index-invalidation-caused-by-implicit-conversion.md)
 
@@ -229,7 +219,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 **重要知识点：**
 
-- [3种常用的缓存读写策略详解](./docs/database/redis/3-commonly-used-cache-read-and-write-strategies.md)
+- [3 种常用的缓存读写策略详解](./docs/database/redis/3-commonly-used-cache-read-and-write-strategies.md)
 - [Redis 5 种基本数据结构详解](./docs/database/redis/redis-data-structures-01.md)
 - [Redis 3 种特殊数据结构详解](./docs/database/redis/redis-data-structures-02.md)
 - [Redis 持久化机制详解](./docs/database/redis/redis-persistence.md)
@@ -244,7 +234,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 ## 搜索引擎
 
-[Elasticsearch常见面试题总结(付费)](./docs/database/elasticsearch/elasticsearch-questions-01.md)
+[Elasticsearch 常见面试题总结(付费)](./docs/database/elasticsearch/elasticsearch-questions-01.md)
 
 ![JavaGuide 官方公众号](https://oss.javaguide.cn/github/javaguide/gongzhonghaoxuanchuan.png)
 
@@ -260,13 +250,13 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 ### Docker
 
-* [Docker 核心概念总结](./docs/tools/docker/docker-intro.md)
-* [Docker 实战](./docs/tools/docker/docker-in-action.md)
+- [Docker 核心概念总结](./docs/tools/docker/docker-intro.md)
+- [Docker 实战](./docs/tools/docker/docker-in-action.md)
 
 ### Git
 
-* [Git 核心概念总结](./docs/tools/git/git-intro.md)
-* [Github 实用小技巧总结](./docs/tools/git/github-tips.md)
+- [Git 核心概念总结](./docs/tools/git/git-intro.md)
+- [Github 实用小技巧总结](./docs/tools/git/github-tips.md)
 
 ## 系统设计
 
@@ -277,7 +267,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 - [RestFul API 简明教程](./docs/system-design/basis/RESTfulAPI.md)
 - [软件工程简明教程简明教程](./docs/system-design/basis/software-engineering.md)
-- [代码命名指南](./docs/system-design/basis/naming.md) 
+- [代码命名指南](./docs/system-design/basis/naming.md)
 - [代码重构指南](./docs/system-design/basis/refactoring.md)
 - [单元测试指南](./docs/system-design/basis/unit-test.md)
 
@@ -312,10 +302,9 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 - [SSO 单点登录详解](./docs/system-design/security/sso-intro.md)
 - [权限系统设计详解](./docs/system-design/security/design-of-authority-system.md)
 
-
 #### 数据脱敏
 
-数据脱敏说的就是我们根据特定的规则对敏感信息数据进行变形，比如我们把手机号、身份证号某些位数使用 * 来代替。
+数据脱敏说的就是我们根据特定的规则对敏感信息数据进行变形，比如我们把手机号、身份证号某些位数使用 \* 来代替。
 
 #### 敏感词过滤
 
@@ -360,8 +349,8 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 ### RPC
 
-* [RPC 基础常见知识点&面试题总结](./docs/distributed-system/rpc/rpc-intro.md)
-* [Dubbo 常见知识点&面试题总结](./docs/distributed-system/rpc/dubbo.md)
+- [RPC 基础常见知识点&面试题总结](./docs/distributed-system/rpc/rpc-intro.md)
+- [Dubbo 常见知识点&面试题总结](./docs/distributed-system/rpc/dubbo.md)
 
 ### ZooKeeper
 
@@ -423,20 +412,19 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 ### 灾备设计和异地多活
 
-**灾备**  = 容灾+备份。
+**灾备** = 容灾+备份。
 
-* **备份** ： 将系统所产生的的所有重要数据多备份几份。
-* **容灾** ： 在异地建立两个完全相同的系统。当某个地方的系统突然挂掉，整个应用系统可以切换到另一个，这样系统就可以正常提供服务了。
+- **备份** ： 将系统所产生的的所有重要数据多备份几份。
+- **容灾** ： 在异地建立两个完全相同的系统。当某个地方的系统突然挂掉，整个应用系统可以切换到另一个，这样系统就可以正常提供服务了。
 
 **异地多活** 描述的是将服务部署在异地并且服务同时对外提供服务。和传统的灾备设计的最主要区别在于“多活”，即所有站点都是同时在对外提供服务的。异地多活是为了应对突发状况比如火灾、地震等自然或者人为灾害。
 
 ## Star 趋势
 
-![](https://api.star-history.com/svg?repos=Snailclimb/JavaGuide&type=Date)
+![Stars](https://api.star-history.com/svg?repos=Snailclimb/JavaGuide&type=Date)
 
 ## 公众号
 
 如果大家想要实时关注我更新的文章以及分享的干货的话，可以关注我的公众号。
 
 ![JavaGuide 官方公众号](https://oss.javaguide.cn/github/javaguide/gongzhonghaoxuanchuan.png)
-