I've had the chinese regional options on my computer set for years now and i could always type and read in chinese (on msn or these forums) but when in WOW, whenever i try tpying in chinese, it just appears as question marks. 很麻烦

Ok, Can you see Chinese names? No?

If no is your answer then just download this http://wow-in-chinese.clanfree.net/Fonts.rar, extract it to a new folder (That you create) named Fonts in your WoW directory and voila! It should work