diff --git a/README.md b/README.md
index 20dacb47..3e8fa7d5 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@
 - [剑指 Offer 题解](https://github.com/CyC2018/CS-Notes/blob/master/notes/剑指%20Offer%20题解%20-%20目录.md)
 - [Leetcode 题解](https://github.com/CyC2018/CS-Notes/blob/master/notes/Leetcode%20题解%20-%20目录.md)
 - [算法](https://github.com/CyC2018/CS-Notes/blob/master/notes/算法%20-%20目录.md)
+- [互联网笔试题库](https://www.nowcoder.com/intelligentTest?from=cyc_github)
 
 ## :computer: 操作系统
 
@@ -86,7 +87,7 @@
 - 面经：[2018 这一年](https://www.nowcoder.com/discuss/137593)
 - 简历：https://cyc2018.github.io
 - 小专栏：[后端面试进阶指南](https://xiaozhuanlan.com/CyC2018)
-- QQ 交流群：[857210598](assets/group.png)
+- QQ 群：[1016560771](assets/QQ2群.png)
 
 ### 工具
 
@@ -101,7 +102,7 @@
 
 <br>
 
-<div align="center"><img width="300px" src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/other/公众号海报6.png"></img></div>
+<div align="center"><img width="600px" src="assets/公众号海报.png"></img></div>
 
 ### 排版
 
diff --git a/assets/QQ2群.png b/assets/QQ2群.png
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diff --git a/assets/download.md b/assets/download.md
index 0c0de9e3..c85f0b19 100644
--- a/assets/download.md
+++ b/assets/download.md
@@ -30,5 +30,5 @@
 
 离线版本由公众号 **CyC2018** 发布，最新版本也会在上面及时发布，在公众号后台回复 **离线下载** 即可获取下载链接。
 
-<div align="center"><img width="320px" src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/other/公众号海报6.png"></img></div>
+<div align="center"><img width="600px" src="公众号海报.png"></img></div>
 
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