diff --git a/miniprogram/core/data/categories.ts b/miniprogram/core/data/categories.ts
index efaec3a..a81f627 100644
--- a/miniprogram/core/data/categories.ts
+++ b/miniprogram/core/data/categories.ts
@@ -23,7 +23,7 @@ export const CATEGORY_LIST: CategoryType[] = [
     {
         id: 'pinyin',
         name: '汉语拼音',
-        icon: '🔤',
+        icon: 'ǎ',
         path: '/pages/category/category?id=pinyin',
     },
     {