Normal fonts are vectors, sprite fonts are bitmaps. Normal fonts for Chinese are usually procedurally generated, I'm guessing.
You can definitely generate Chinese character sprite fonts from a normal font, but loading and referencing such a large file into memory could cause problems.
There are hacky type solutions out there that only load subsets of the font when required, but I have no idea how to go about implementing such a thing.
The bigger problem is that no one wants to design a nice looking diablo style font in Chinese for some 20,000 characters (actually 50,000, but most of those never get used).