diff --git a/packages/vant/docs/markdown/quickstart.en-US.md b/packages/vant/docs/markdown/quickstart.en-US.md
index 1314ae181..35ce762d9 100644
--- a/packages/vant/docs/markdown/quickstart.en-US.md
+++ b/packages/vant/docs/markdown/quickstart.en-US.md
@@ -213,6 +213,11 @@ import 'vant/es/image-preview/style';
 
 > Tip: "Full Import" and "On-demand Import" should not be used at the same time, otherwise it will lead to problems such as code duplication and style overrides.
 
+#### Tips
+
+- "Full Import" and "On-demand Import" should not be used at the same time, otherwise it will lead to problems such as code duplication and style overrides.
+- unplugin-vue-components is not officially maintained by Vant. If you encounter issues when using this plugin, please feedback to [antfu/unplugin-vue-components](https://github.com/antfu/unplugin-vue-components) repository.
+
 ## With Frameworks
 
 ### Use Vant in Nuxt 3
diff --git a/packages/vant/docs/markdown/quickstart.zh-CN.md b/packages/vant/docs/markdown/quickstart.zh-CN.md
index 80ceb84ba..7f73233ad 100644
--- a/packages/vant/docs/markdown/quickstart.zh-CN.md
+++ b/packages/vant/docs/markdown/quickstart.zh-CN.md
@@ -218,7 +218,10 @@ import 'vant/es/image-preview/style';
 
 你可以在项目的入口文件或公共模块中引入以上组件的样式，这样在业务代码中使用组件时，便不再需要重复引入样式了。
 
-> 提示：在单个项目中不应该同时使用「全量引入」和「按需引入」，否则会导致代码重复、样式错乱等问题。
+#### 使用提示
+
+- 请避免同时使用「全量引入」和「按需引入」这两种引入方式，否则会导致代码重复、样式错乱等问题。
+- unplugin-vue-components 并不是 Vant 官方维护的插件，如果在使用过程中遇到问题，建议优先到 [antfu/unplugin-vue-components](https://github.com/antfu/unplugin-vue-components) 仓库下反馈。
 
 ## 在框架中使用
 
diff --git a/packages/vant/src/image-preview/ImagePreviewItem.tsx b/packages/vant/src/image-preview/ImagePreviewItem.tsx
index f02210743..a2db21706 100644
--- a/packages/vant/src/image-preview/ImagePreviewItem.tsx
+++ b/packages/vant/src/image-preview/ImagePreviewItem.tsx
@@ -195,6 +195,8 @@ export default defineComponent({
 
       const { offsetX, offsetY } = touch;
       const deltaTime = Date.now() - touchStartTime;
+
+      // Same as the default value of iOS double tap timeout
       const TAP_TIME = 250;
       const TAP_OFFSET = 5;