Hi Nancy as you may know to display those characters you need to be using the correct font for winmx , as normal western fonts do not work with the twin byte method asian languages require.
I have a tutorial for the Japanese language , I,m sure the method is the same for Chinese if you have installed a font that supports Chinese characters.
https://www.winmxworld.com/tutorials/winmx_japanese_language.htmlIf you need winmx itself to be in Chinese or any other language you would need to add a language text file to your winmx folder in program files, you can obtain a language file here, its important to rename the file to
language.txt for it to work.
httpss://archive.winmxworld.com/WinMX%20Language%20Files/
I hope you find this helpful with resolving your problem