diff --git a/_sidebar.md b/_sidebar.md
index 586c58f..1c9f5e3 100644
--- a/_sidebar.md
+++ b/_sidebar.md
@@ -17,6 +17,7 @@
 - 面试和算法
   - [面试问题和经验](interview/index.md)
   - [算法题](algorithm/index.md)
-  
+
+- [WWW.OSSEZ.COM](https://www.ossez.com/categories)  
 - [DOCS.OSSEZ.COM](https://docs.ossez.com/#/)
-- [Changelog](changelog.md)
\ No newline at end of file
+- [WWW.CWIKI.US](https://www.cwiki.us/)
\ No newline at end of file