*Get some hex-editor. Heres one for example:

*Backup your conquer.exe file (better to have original if you do something wrong)
*Run hex-editor and open conquer.exe in it
*Use search function to find "English"
*Change "English" to "Chinese" and whole progress
*Exit hex-editor, run CO as many as your computer can handle with
It is really easy to make your own and you can do it in like 30 seconds. I had mine even before 5016 maintenace ends.