diff --git a/Universal/StringUtility.cpp b/Universal/StringUtility.cpp
index 9ffad08..17b7acb 100644
--- a/Universal/StringUtility.cpp
+++ b/Universal/StringUtility.cpp
@@ -96,5 +96,25 @@ slow:
     return true;
 }
 
+std::string UTF8ToGBK(const std::string &utf8Str) {
+    int wideStrLen = MultiByteToWideChar(CP_UTF8, 0, utf8Str.c_str(), -1, NULL, 0);
+    if (wideStrLen == 0) {
+        return "";
+    }
+
+    std::wstring wideStr(wideStrLen, 0);
+    MultiByteToWideChar(CP_UTF8, 0, utf8Str.c_str(), -1, &wideStr[0], wideStrLen);
+
+    int gbkStrLen = WideCharToMultiByte(CP_ACP, 0, wideStr.c_str(), -1, NULL, 0, NULL, NULL);
+    if (gbkStrLen == 0) {
+        return "";
+    }
+
+    std::string gbkStr(gbkStrLen, 0);
+    WideCharToMultiByte(CP_ACP, 0, wideStr.c_str(), -1, &gbkStr[0], gbkStrLen, NULL, NULL);
+
+    return gbkStr;
+}
+
 } // namespace StringUtility
 } // namespace Amass
diff --git a/Universal/StringUtility.h b/Universal/StringUtility.h
index 7da127c..5161557 100644
--- a/Universal/StringUtility.h
+++ b/Universal/StringUtility.h
@@ -61,6 +61,7 @@ std::string_view utf8At(const std::string &text, size_t index);
 size_t utf8CharacterByteSize(const char *character);
 std::wstring stringToWString(const std::string &string);
 std::string wstringToString(const std::wstring &string);
+std::string UTF8ToGBK(const std::string &utf8Str);
 
 } // namespace StringUtility