diff --git a/src/MaaWpfGui/Models/ResourceUpdater.cs b/src/MaaWpfGui/Models/ResourceUpdater.cs
index 811f71551c..b4da994d4e 100644
--- a/src/MaaWpfGui/Models/ResourceUpdater.cs
+++ b/src/MaaWpfGui/Models/ResourceUpdater.cs
@@ -482,7 +482,16 @@ namespace MaaWpfGui.Models
             return true;
         }
 
-        // 从 MirrorChyan 下载完整包
+        /// <summary>
+        /// 从 MirrorChyan 检查更新
+        /// </summary>
+        /// <returns>返回一个 <see cref="CheckUpdateRetT"/> 枚举值，指示更新检查的结果。
+        /// <list type="bullet">
+        /// <item><description><see cref="CheckUpdateRetT.AlreadyLatest"/>：已是最新版本。</description></item>
+        /// <item><description><see cref="CheckUpdateRetT.OK"/>：有新版本。</description></item>
+        /// <item><description><see cref="CheckUpdateRetT.NetworkError"/>：网络错误。</description></item>
+        /// <item><description><see cref="CheckUpdateRetT.UnknownError"/>：其他错误。</description></item>
+        /// </list></returns>
         public static async Task<(CheckUpdateRetT Ret, string? UpdateUrl)> CheckFromMirrorChyanAsync()
         {
             // https://mirrorc.top/api/resources/MaaResource/latest?current_version=<当前版本日期，从 version.json 里拿时间戳>&cdk=<cdk>&sp_id=<唯一识别码>
@@ -642,7 +651,7 @@ namespace MaaWpfGui.Models
         /// <returns>返回一个 <see cref="CheckUpdateRetT"/> 枚举值，指示更新检查和下载的结果。
         /// <list type="bullet">
         /// <item><description><see cref="CheckUpdateRetT.AlreadyLatest"/>：已是最新版本。</description></item>
-        /// <item><description><see cref="CheckUpdateRetT.OK"/>：检查成功。（海外源不会自动下载）</description></item>
+        /// <item><description><see cref="CheckUpdateRetT.OK"/>：有新版本。（海外源不会自动下载）</description></item>
         /// <item><description><see cref="CheckUpdateRetT.OnlyGameResourceUpdated"/>：下载成功。</description></item>
         /// <item><description><see cref="CheckUpdateRetT.NetworkError"/>：网络错误。</description></item>
         /// <item><description><see cref="CheckUpdateRetT.UnknownError"/>：其他错误。</description></item>
diff --git a/src/MaaWpfGui/ViewModels/UserControl/Settings/VersionUpdateSettingsUserControlModel.cs b/src/MaaWpfGui/ViewModels/UserControl/Settings/VersionUpdateSettingsUserControlModel.cs
index c1c36b641b..24f0f5b697 100644
--- a/src/MaaWpfGui/ViewModels/UserControl/Settings/VersionUpdateSettingsUserControlModel.cs
+++ b/src/MaaWpfGui/ViewModels/UserControl/Settings/VersionUpdateSettingsUserControlModel.cs
@@ -413,7 +413,7 @@ public class VersionUpdateSettingsUserControlModel : PropertyChangedBase
             ToastNotification.ShowDirect(toastMessage);
         }
 
-        if (ret != VersionUpdateViewModel.CheckUpdateRetT.OK)
+        if (ret == VersionUpdateViewModel.CheckUpdateRetT.AlreadyLatest)
         {
             SettingsViewModel.VersionUpdateSettings.IsCheckingForUpdates = false;
             return;
@@ -422,7 +422,7 @@ public class VersionUpdateSettingsUserControlModel : PropertyChangedBase
         bool success = UpdateSource switch
         {
             "Github" => await ResourceUpdater.UpdateFromGithubAsync(),
-            "MirrorChyan" => await ResourceUpdater.DownloadFromMirrorChyanAsync(uri),
+            "MirrorChyan" => (ret == VersionUpdateViewModel.CheckUpdateRetT.OK) && await ResourceUpdater.DownloadFromMirrorChyanAsync(uri),
             _ => await ResourceUpdater.UpdateFromGithubAsync(),
         };