diff --git a/CMakeLists.txt b/CMakeLists.txt
index e101f20..a988ab2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,8 +44,8 @@ add_executable(generate_valid src/generate_valid.cpp)
 target_link_libraries(generate_valid PRIVATE RegistrationDLL)
 
 # --- 生成有效许可证文件程序 ---
-add_executable(generate_valid src/generate_valid.cpp)
-target_link_libraries(generate_valid PRIVATE RegistrationDLL)
+add_executable(test_encryption src/test_encryption.cpp)
+target_link_libraries(test_encryption PRIVATE RegistrationDLL)
 
 # 将生成的文件输出到 build/bin 目录
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
diff --git a/src/gui.cpp b/src/gui.cpp
index 3627638..19059a2 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -101,7 +101,7 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
             // --- Middle Part: Decryption ---
             CreateWindow("STATIC", "Decrypt Encrypted Code", WS_VISIBLE | WS_CHILD | BS_GROUPBOX, 10, 50, 460, 120, hwnd, (HMENU)IDC_DEC_GROUP, NULL, NULL);
             CreateWindow("STATIC", "Encrypted Code:", WS_VISIBLE | WS_CHILD, 30, 80, 150, 20, hwnd, (HMENU)IDC_DEC_INPUT_LABEL, NULL, NULL);
-            hDecInputEdit = CreateWindow("EDIT", "", WS_VISIBLE | WS_CHILD | WS_BORDER, 190, 80, 260, 20, hwnd, (HMENU)IDC_DEC_INPUT_EDIT, NULL, NULL);
+            hDecInputEdit = CreateWindow("EDIT", "", WS_VISIBLE | WS_CHILD | WS_BORDER, 190, 80, 270, 20, hwnd, (HMENU)IDC_DEC_INPUT_EDIT, NULL, NULL);
             CreateWindow("BUTTON", "Decrypt", WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 190, 110, 120, 30, hwnd, (HMENU)IDC_DEC_BUTTON, NULL, NULL);
             CreateWindow("STATIC", "Original Machine Code:", WS_VISIBLE | WS_CHILD, 30, 145, 150, 20, hwnd, (HMENU)IDC_DEC_OUTPUT_LABEL, NULL, NULL);
             hDecOutputEdit = CreateWindow("EDIT", "", WS_VISIBLE | WS_CHILD | WS_BORDER | ES_READONLY, 190, 145, 260, 20, hwnd, (HMENU)IDC_DEC_OUTPUT_EDIT, NULL, NULL);
@@ -142,7 +142,7 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
                     char encryptedCode[64];
                     GetWindowText(hDecInputEdit, encryptedCode, sizeof(encryptedCode));
                     int len = strlen(encryptedCode);
-                    if (strlen(encryptedCode) != 30) {
+                    if (strlen(encryptedCode) != 32) {
                         MessageBox(hwnd, "Please enter a valid 32-character encrypted code.", "Error", MB_ICONERROR);
                         break;
                     }
diff --git a/src/machine_code.cpp b/src/machine_code.cpp
index c93dd70..8b2b3d4 100644
--- a/src/machine_code.cpp
+++ b/src/machine_code.cpp
@@ -148,5 +148,5 @@ std::string getMachineCode() {
     macAddress.erase(std::remove_if(macAddress.begin(), macAddress.end(), isspace), macAddress.end());
     macAddress.erase(std::remove(macAddress.begin(), macAddress.end(), ':'), macAddress.end());
 
-    return cpuId + "-" + macAddress;
+    return cpuId + macAddress;
 }
diff --git a/src/test_license.cpp b/src/test_license.cpp
index 38ec535..4eefb1c 100644
--- a/src/test_license.cpp
+++ b/src/test_license.cpp
@@ -30,14 +30,14 @@ int main(int argc, char* argv[]) {
     std::cout << "Generating license with expiration date: " << future_date << std::endl;
     char code[33] = { 0 };
     DecryptCodeAndGetMachineCode(machine_code, code, 33);
-    int gen_result = GenerateLicenseFileFromCode(code, future_date);
+    /*int gen_result = GenerateLicenseFileFromCode(code, future_date);
     if (gen_result == 0) {
         std::cout << "License.data generated successfully." << std::endl;
     } else {
         std::cout << "!! ERROR: Failed to generate License.data." << std::endl;
         return 1;
     }
-    std::cout << std::endl;
+    std::cout << std::endl;*/
 
     // --- Step 2: Validate the generated file ---
     std::cout << "--- Step 2: Validating the newly created License.data file ---" << std::endl;