diff --git a/Demo/Ranking/Assets/RankDemo/Ranking.cs b/Demo/Ranking/Assets/RankDemo/Ranking.cs
index e8ab9823b..110f3ee09 100644
--- a/Demo/Ranking/Assets/RankDemo/Ranking.cs
+++ b/Demo/Ranking/Assets/RankDemo/Ranking.cs
@@ -83,7 +83,7 @@ void InitOpenDataContext()
     {
         if (openDataContext == null)
         {
-            WXOpenDataContext openDataContext = WX.GetOpenDataContext(new OpenDataContextOption
+            openDataContext = WX.GetOpenDataContext(new OpenDataContextOption
             {
                 sharedCanvasMode = selectedCanvasType
             });
diff --git a/Design/WechatPreview.md b/Design/WechatPreview.md
new file mode 100644
index 000000000..dbc6ccfd0
--- /dev/null
+++ b/Design/WechatPreview.md
@@ -0,0 +1,5 @@
+# **快适配小游戏预览插件**
+
+​	为了解决开发阶段频繁迭代时转换小游戏时间过长的问题，推出了基于`WebRTC`音视频传输与`Unity Editor`环境的小游戏实时预览插件。该插件无需转换即可预览小游戏效果，旨在显著提升开发效率，缩短开发者在迭代过程中等待预览效果的时间。
+
+​	由于该插件环境较为受限并且依赖较多，故作为独立包发布。**详见[预览插件](https://github.com/wechat-miniprogram/minigame-unity-wechat-preview)。**
\ No newline at end of file