diff --git a/ChangeLog.md b/ChangeLog.md
index b849300..5cba9b9 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,9 +1,14 @@
 # ChangeLog
 
+### 2022-03-07
+
+- Add [Strings](https://practice.rs/collections/string.html)
+
+
 ### 2022-03-06
 
 - Add [Advanced Traits](https://practice.rs/generics-traits/advanced-traits.html)
-- 
+
 ### 2022-03-05
 
 - Add [Trati object](https://practice.rs/generics-traits/trait-object.html)
diff --git a/Readme.md b/Readme.md
index 98995a3..92a8212 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,7 +2,7 @@
 
 This book was designed for easily diving into Rust, and it's very easy to use: All you need to do is to make each exercise compile without ERRORS and Panics !
 
-> 🎊 Updated on 2022-03-06: Add [Advanced Traits](https://practice.rs/generics-traits/advanced-traits.html)
+> 🎊 Updated on 2022-03-07: Add [Strings](https://practice.rs/collections/string.html)
 
 ## Read online
 
diff --git a/zh-CN/src/generics-traits/advanced-traits.md b/zh-CN/src/generics-traits/advanced-traits.md
new file mode 100644
index 0000000..0cb2362
--- /dev/null
+++ b/zh-CN/src/generics-traits/advanced-traits.md
@@ -0,0 +1 @@
+# 进一步深入特征