diff --git a/Packages/ShapsBenkau_SwiftUIBackports/Package.swift b/Packages/ShapsBenkau_SwiftUIBackports/Package.swift
index 3d4c7f01..823340bc 100755
--- a/Packages/ShapsBenkau_SwiftUIBackports/Package.swift
+++ b/Packages/ShapsBenkau_SwiftUIBackports/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.5
+// swift-tools-version:5.3
 import PackageDescription
 
 let package = Package(
diff --git a/Packages/vChewing_MainAssembly/.gitignore b/Packages/vChewing_MainAssembly/.gitignore
new file mode 100644
index 00000000..3b298120
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/.gitignore
@@ -0,0 +1,9 @@
+.DS_Store
+/.build
+/Packages
+/*.xcodeproj
+xcuserdata/
+DerivedData/
+.swiftpm/config/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc
diff --git a/Packages/vChewing_MainAssembly/Package.swift b/Packages/vChewing_MainAssembly/Package.swift
new file mode 100644
index 00000000..13006a3b
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/Package.swift
@@ -0,0 +1,64 @@
+// swift-tools-version:5.3
+import PackageDescription
+
+let package = Package(
+  name: "MainAssembly",
+  platforms: [
+    .macOS(.v10_13),
+  ],
+  products: [
+    .library(
+      name: "MainAssembly",
+      targets: ["MainAssembly"]
+    ),
+  ],
+  dependencies: [
+    .package(path: "../Jad_BookmarkManager"),
+    .package(path: "../vChewing_CandidateWindow"),
+    .package(path: "../vChewing_CocoaExtension"),
+    .package(path: "../DanielGalasko_FolderMonitor"),
+    .package(path: "../vChewing_Hotenka"),
+    .package(path: "../vChewing_IMKUtils"),
+    .package(path: "../vChewing_LangModelAssembly"),
+    .package(path: "../vChewing_Megrez"),
+    .package(path: "../vChewing_NotifierUI"),
+    .package(path: "../vChewing_PhraseEditorUI"),
+    .package(path: "../vChewing_PopupCompositionBuffer"),
+    .package(path: "../vChewing_Shared"),
+    .package(path: "../Qwertyyb_ShiftKeyUpChecker"),
+    .package(path: "../vChewing_SwiftExtension"),
+    .package(path: "../vChewing_Tekkon"),
+    .package(path: "../vChewing_TooltipUI"),
+    .package(path: "../vChewing_UpdateSputnik"),
+    .package(path: "../vChewing_Uninstaller"),
+  ],
+  targets: [
+    .target(
+      name: "MainAssembly",
+      dependencies: [
+        .product(name: "BookmarkManager", package: "Jad_BookmarkManager"),
+        .product(name: "CandidateWindow", package: "vChewing_CandidateWindow"),
+        .product(name: "CocoaExtension", package: "vChewing_CocoaExtension"),
+        .product(name: "Hotenka", package: "vChewing_Hotenka"),
+        .product(name: "FolderMonitor", package: "DanielGalasko_FolderMonitor"),
+        .product(name: "IMKUtils", package: "vChewing_IMKUtils"),
+        .product(name: "LangModelAssembly", package: "vChewing_LangModelAssembly"),
+        .product(name: "Megrez", package: "vChewing_Megrez"),
+        .product(name: "NotifierUI", package: "vChewing_NotifierUI"),
+        .product(name: "PhraseEditorUI", package: "vChewing_PhraseEditorUI"),
+        .product(name: "PopupCompositionBuffer", package: "vChewing_PopupCompositionBuffer"),
+        .product(name: "Shared", package: "vChewing_Shared"),
+        .product(name: "ShiftKeyUpChecker", package: "Qwertyyb_ShiftKeyUpChecker"),
+        .product(name: "SwiftExtension", package: "vChewing_SwiftExtension"),
+        .product(name: "Tekkon", package: "vChewing_Tekkon"),
+        .product(name: "TooltipUI", package: "vChewing_TooltipUI"),
+        .product(name: "UpdateSputnik", package: "vChewing_UpdateSputnik"),
+        .product(name: "Uninstaller", package: "vChewing_Uninstaller"),
+      ]
+    ),
+    .testTarget(
+      name: "MainAssemblyTests",
+      dependencies: ["MainAssembly"]
+    ),
+  ]
+)
diff --git a/Packages/vChewing_MainAssembly/README.md b/Packages/vChewing_MainAssembly/README.md
new file mode 100644
index 00000000..6c37b015
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/README.md
@@ -0,0 +1,3 @@
+# MainAssembly
+
+威注音輸入法核心元件。
diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/MainAssembly.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/MainAssembly.swift
new file mode 100644
index 00000000..e86e00c9
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/MainAssembly.swift
@@ -0,0 +1,5 @@
+public struct MainAssembly {
+  public private(set) var text = "Hello, World!"
+
+  public init() {}
+}
diff --git a/Packages/vChewing_MainAssembly/Tests/MainAssemblyTests/MainAssemblyTests.swift b/Packages/vChewing_MainAssembly/Tests/MainAssemblyTests/MainAssemblyTests.swift
new file mode 100644
index 00000000..8a50fed2
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/Tests/MainAssemblyTests/MainAssemblyTests.swift
@@ -0,0 +1,11 @@
+@testable import MainAssembly
+import XCTest
+
+final class MainAssemblyTests: XCTestCase {
+  func testExample() throws {
+    // This is an example of a functional test case.
+    // Use XCTAssert and related functions to verify your tests produce the correct
+    // results.
+    XCTAssertEqual(MainAssembly().text, "Hello, World!")
+  }
+}