diff --git a/en/src/compound-types/slice.md b/en/src/compound-types/slice.md
index b9d149d..5fe1e65 100644
--- a/en/src/compound-types/slice.md
+++ b/en/src/compound-types/slice.md
@@ -25,9 +25,9 @@ fn main() {
 
     let slice = &arr[..2];
     
-    // Modify '6' to make it work
-    // TIPS: slice( reference ) IS NOT an array, if it is an array, then `assert!` will passed: Each of the two UTF-8 chars '中' and '国'  occupies 3 bytes, 2 * 3 = 6
-    assert!(std::mem::size_of_val(&slice) == 6);
+    // Modify '8' to make it work
+    // TIPS: slice( reference ) IS NOT an array, if it is an array, then `assert!` will passed: Each of the two chars '中' and '国'  occupies 4 bytes, 2 * 4 = 8
+    assert!(std::mem::size_of_val(&slice) == 8);
 
     println!("Success!");
 }
diff --git a/zh-CN/src/compound-types/slice.md b/zh-CN/src/compound-types/slice.md
index 4cb9956..b6baa47 100644
--- a/zh-CN/src/compound-types/slice.md
+++ b/zh-CN/src/compound-types/slice.md
@@ -25,9 +25,9 @@ fn main() {
 
     let slice = &arr[..2];
     
-    // 修改数字 `6` 让代码工作
-    // 小提示: 切片和数组不一样，它是引用。如果是数组的话，那下面的 `assert!` 将会通过： 因为'中'和'国'是 UTF-8 字符，它们每个占用 3 个字节，2 个字符就是 6 个字节
-    assert!(std::mem::size_of_val(&slice) == 6);
+    // 修改数字 `8` 让代码工作
+    // 小提示: 切片和数组不一样，它是引用。如果是数组的话，那下面的 `assert!` 将会通过： '中'和'国'是char类型，char类型是Unicode编码，大小固定为4字节，两个字符为8字节。
+    assert!(std::mem::size_of_val(&slice) == 8);
 }
 ```
 
diff --git a/zh-CN/src/pattern-match/match-iflet.md b/zh-CN/src/pattern-match/match-iflet.md
index d37e931..757ca7c 100644
--- a/zh-CN/src/pattern-match/match-iflet.md
+++ b/zh-CN/src/pattern-match/match-iflet.md
@@ -194,4 +194,4 @@ fn main() {
  }
 ```
 
-> 你可以在[这里](https://github.com/sunface/rust-by-practice/blob/master/solutions/pattern-match/match-iflet.md)找到答案(在 solutions 路径下) 
\ No newline at end of file
+> 你可以在[这里](https://github.com/sunface/rust-by-practice/blob/master/solutions/pattern-match/match.md)找到答案(在 solutions 路径下) 
\ No newline at end of file