diff --git a/zh-cn/application-dev/database/database-mdds-guidelines.md b/zh-cn/application-dev/database/database-mdds-guidelines.md
index 7e78f4687467dcc193e1d0f236179323526a6d19..42184389ff547f87dbd44b7efa0c81283cdd4c6c 100644
--- a/zh-cn/application-dev/database/database-mdds-guidelines.md
+++ b/zh-cn/application-dev/database/database-mdds-guidelines.md
@@ -75,12 +75,11 @@
    ```js
    // FA模型获取context
    import featureAbility from '@ohos.ability.featureAbility';
-   var context = null;
    let context = featureAbility.getContext();
 
    // Stage模型获取context
    import AbilityStage from '@ohos.application.Ability'
-   var context = null;
+   let context = null;
    class MainAbility extends Ability{
       onWindowStageCreate(windowStage){
         context = this.context;