diff --git a/.github/workflows/alpha.yml b/.github/workflows/alpha.yml
index b9a8c6a5..818e788f 100644
--- a/.github/workflows/alpha.yml
+++ b/.github/workflows/alpha.yml
@@ -29,15 +29,7 @@ on:
 
 jobs:
   build:
-    runs-on: ${{ matrix.runner }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        runner:
-          - self-hosted
-          - windows-latest
-
+    runs-on: self-hosted
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -53,13 +45,55 @@ jobs:
         run: dotnet tool restore && dotnet cake
         env:
           VERSION_API_TOKEN: ${{ secrets.VERSION_API_TOKEN }}
-
-      - name: Sign Msix
-        if: success() && github.event_name != 'pull_request'
-        shell: pwsh
-        run: |
-          [System.Convert]::FromBase64String("${{ secrets.CERTIFICATE }}") | Set-Content -AsByteStream temp.pfx
-          signtool.exe sign /debug /v /a /fd SHA256 /f temp.pfx /p ${{ secrets.PW }} ${{ github.workspace }}\src\output\Snap.Hutao.Alpha-${{ steps.cake.outputs.version }}.msix
+          CERTIFICATE: ${{ secrets.CERTIFICATE }}
+          PW: ${{ secrets.PW }}
+
+      - name: Upload signed msix
+        if: success() && github.event_name != 'pull_request'
+        uses: actions/upload-artifact@v4
+        with:
+          name: Snap.Hutao.Alpha-${{ steps.cake.outputs.version }}
+          path: ${{ github.workspace }}/src/output/Snap.Hutao.Alpha-${{ steps.cake.outputs.version }}.msix
+
+      - name: Add summary
+        if: success() && github.event_name != 'pull_request'
+        shell: pwsh
+        run: |
+          $summary = "
+          > [!WARNING]
+          > 该版本是由 CI 程序自动打包生成的 `Alpha` 测试版本，**仅供开发者测试使用**
+
+          > [!TIP]
+          > 普通用户请[点击这里](https://github.com/DGP-Studio/Snap.Hutao/releases/latest/)下载最新的稳定版本
+
+          > [!IMPORTANT]
+          > 请注意，从 Snap Hutao Alpha 2023.12.21.3 开始，我们将使用全新的 CI 证书，原有的 Snap.Hutao.CI.cer 将在几天后过期停止使用。
+          >
+          > 请安装 [DGP_Studio_CA.crt](https://github.com/DGP-Automation/Hutao-Auto-Release/releases/download/certificate-ca/DGP_Studio_CA.crt) 到 `受信任的根证书颁发机构` 以安装测试版安装包
+          "
+
+          echo $summary >> $Env:GITHUB_STEP_SUMMARY
+  fallback_build:
+    runs-on: windows-latest
+    needs: build
+    if: failure()
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 8.0
+
+      - name: Cake
+        id: cake
+        shell: pwsh
+        run: dotnet tool restore && dotnet cake
+        env:
+          VERSION_API_TOKEN: ${{ secrets.VERSION_API_TOKEN }}
+          CERTIFICATE: ${{ secrets.CERTIFICATE }}
+          PW: ${{ secrets.PW }}
 
       - name: Upload signed msix
         if: success() && github.event_name != 'pull_request'
diff --git a/build.cake b/build.cake
index c244c84d..2efbc8f6 100644
--- a/build.cake
+++ b/build.cake
@@ -11,6 +11,8 @@ var version = "version";
 var repoDir = "repoDir";
 var outputPath = "outputPath";
 
+var pw = "pw";
+
 // Extension
 
 static ProcessArgumentBuilder AppendIf(this ProcessArgumentBuilder builder, string text, bool condition)
@@ -62,6 +64,10 @@ if (GitHubActions.IsRunningOnGitHubActions)
             }
         );
 
+        var certificateBase64 = HasEnvironmentVariable("CERTIFICATE") ? EnvironmentVariable("CERTIFICATE") : throw new Exception("Cannot find CERTIFICATE");
+        pw = HasEnvironmentVariable("PW") ? EnvironmentVariable("PW") : throw new Exception("Cannot find PW");
+        System.IO.File.WriteAllBytes(System.IO.Path.Combine(outputPath, "temp.pfx"), System.Convert.FromBase64String(certificateBase64));
+
         Information($"Version: {version}");
     }
 
@@ -88,10 +94,19 @@ else // Local
     Information($"Version: {version}");
 }
 
+// Windows SDK
+var registry = new WindowsRegistry();
+var winsdkRegistry = registry.LocalMachine.OpenKey(@"SOFTWARE\Microsoft\Windows Kits\Installed Roots");
+var winsdkVersion = winsdkRegistry.GetSubKeyNames().MaxBy(key => int.Parse(key.Split(".")[2]));
+var winsdkPath = (string)winsdkRegistry.GetValue("KitsRoot10");
+var winsdkBinPath = System.IO.Path.Combine(winsdkPath, "bin", winsdkVersion, "x64");
+Information($"Windows SDK: {winsdkPath}");
+
 Task("Build")
     .IsDependentOn("Build binary package")
     .IsDependentOn("Copy files")
-    .IsDependentOn("Build MSIX");
+    .IsDependentOn("Build MSIX")
+    .IsDependentOn("Sign");
 
 Task("NuGet Restore")
     .Does(() =>
@@ -208,11 +223,7 @@ Task("Build MSIX")
         arguments = "pack /d " + binPath + " /p " + System.IO.Path.Combine(outputPath, $"Snap.Hutao.Local-{version}.msix");
     }
 
-    var registry = new WindowsRegistry();
-    var winsdkRegistry = registry.LocalMachine.OpenKey(@"SOFTWARE\Microsoft\Windows Kits\Installed Roots");
-    var winsdkVersion = winsdkRegistry.GetSubKeyNames().MaxBy(key => int.Parse(key.Split(".")[2]));
-    var winsdkPath = (string)winsdkRegistry.GetValue("KitsRoot10");
-    var makeappxPath = System.IO.Path.Combine(winsdkPath, "bin", winsdkVersion, "x64", "makeappx.exe");
+    var makeappxPath = System.IO.Path.Combine(winsdkBinPath, "makeappx.exe");
 
     var p = StartProcess(
         makeappxPath,
@@ -223,7 +234,47 @@ Task("Build MSIX")
     );
     if (p != 0)
     {
-        throw new InvalidOperationException("Build failed with exit code " + p);
+        throw new InvalidOperationException("Build MSIX failed with exit code " + p);
+    }
+});
+
+Task("Sign")
+    .IsDependentOn("Build MSIX")
+    .Does(() =>
+{
+    if (AppVeyor.IsRunningOnAppVeyor)
+    {
+        Information("Move to SignPath. Skip signing.");
+        return;
+    }
+    else if (GitHubActions.IsRunningOnGitHubActions)
+    {
+        if (GitHubActions.Environment.PullRequest.IsPullRequest)
+        {
+            Information("Is Pull Request. Skip signing.");
+            return;
+        }
+
+        var signPath = System.IO.Path.Combine(winsdkBinPath, "signtool.exe");
+        var pfxPath = System.IO.Path.Combine(outputPath, "temp.pfx");
+        var arguments = $"sign /debug /v /a /fd SHA256 /f {pfxPath} /p {pw} {System.IO.Path.Combine(outputPath, $"Snap.Hutao.Alpha-{version}.msix")}";
+
+        var p = StartProcess(
+            signPath,
+            new ProcessSettings
+            {
+                Arguments = arguments
+            }
+        );
+        if (p != 0)
+        {
+            throw new InvalidOperationException("Sign failed with exit code " + p);
+        }
+    }
+    else
+    {
+        Information("Local configuration. Skip signing.");
+        return;
     }
 });