diff --git a/src/basic/trait/advance-trait.md b/src/basic/trait/advance-trait.md
index 96ae81105f..1955e76a00 100644
--- a/src/basic/trait/advance-trait.md
+++ b/src/basic/trait/advance-trait.md
@@ -84,7 +84,7 @@ fn difference<C: Container>(container: &C) {}
 关联类型还可以被其它特征进行约束，例如：
 ```rust
 trait Container{
-    type A：Display;
+    type A: Display;
     type B;
     fn contains(&self, a: &Self::A, b: &Self::B) -> bool;
 }