diff --git a/src/basic/compound-type/string-slice.md b/src/basic/compound-type/string-slice.md
index 85b55d46..10defa52 100644
--- a/src/basic/compound-type/string-slice.md
+++ b/src/basic/compound-type/string-slice.md
@@ -717,8 +717,8 @@ for b in "中国人".bytes() {
 >     - [习题解答](https://github.com/sunface/rust-by-practice/blob/master/solutions/compound-types/string.md)
 > - [切片](https://practice-zh.course.rs/compound-types/slice.html)
 >     - [习题解答](https://github.com/sunface/rust-by-practice/blob/master/solutions/compound-types/slice.md)
-> - [String](https://practice-zh.course.rs/collections/String.html)
->     - [习题解答](https://github.com/sunface/rust-by-practice/blob/master/solutions/collections/String.md)
+> - [String](https://practice-zh.course.rs/compound-types/string.html)
+>     - [习题解答](https://github.com/sunface/rust-by-practice/blob/master/solutions/compound-types/string.md)
 
 <hr />