diff --git a/zh-cn/application-dev/database/database-preference-guidelines.md b/zh-cn/application-dev/database/database-preference-guidelines.md
index 247076af7599e7343a82bb70380bb2850b519860..9b23a2b9712f4ff200018ec7f27948a16365d95a 100644
--- a/zh-cn/application-dev/database/database-preference-guidelines.md
+++ b/zh-cn/application-dev/database/database-preference-guidelines.md
@@ -171,7 +171,9 @@
        console.info("Failed to delete. Cause: " + err);
    })
    ```
+
 ## 相关实例
+
 针对首选项开发，有以下相关实例可供参考：
 
 - [`Preferences`：首选项（eTS）（API9）](https://gitee.com/openharmony/applications_app_samples/tree/master/data/Preferences)
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