great!
but it cant support chinese font...
It doesn't ship with a Chinese font, you could try the suggested dfiler font or any TTF font with Chinese support (untested, please post feedback).
This native port uses the same code as the Dingux version, however what isn't clear is what encoding the dingoo file system/OS uses, dfiler assumes UTF8 so if the encoding isn't UTF8 (with the correct font) it won't display correctly.
We've talked about unicode support in the native SDK but no one has needed it yet (so no research has been done), if this is something you have an interest we'd love to get more developers for the native SDK.