I would avoid doing this, actually. Talking from experience, if you enter Chinese track names in EAC, you resultant files with have Chinese names. Not all systems can handle this; and even when they do, programs decode Chinese characters erratically (if you are not using Chinese version of OS) and you have to be sure you know what encoding you are using etc. Better to rip them with English titles and use something like MP3tag to tag them afterwards - this way, the files have English names, but tags provide all the meta data in Chinese.
To answer your question though, I tried entering manually Chinese characters into EAC before ripping and it seems to work. Resultant file had garbage characters - though this might be an OS / language encoding issue.
As a side note, I have problems with MP3tag retagging files into Chinese. Sometimes it works, sometimes it CRASHES. I have no idea why.