diff --git a/zh-CN/src/generics-traits/advanced-traits.md b/zh-CN/src/generics-traits/advanced-traits.md
index c5734d7..57df0c2 100644
--- a/zh-CN/src/generics-traits/advanced-traits.md
+++ b/zh-CN/src/generics-traits/advanced-traits.md
@@ -102,6 +102,7 @@ trait UsernameWidget {
     fn get(&self) -> String;
 }
 
+trait AgeWidget {
     fn get(&self) -> u8;
 }