This has been talked about earlier in this thread, but I would also like some clarification in the China [CN] <-> Asia [AS] issue. This crops up time and time again when I'm importing games from Play-Asia that are sold under the Asia region labeling (Hong Kong, Singapore, etc).
China games in [CN] category are going to be games made for Chinese market. They will use China rating and/or have Chinese text on the covers.
Asia [AS] games are typically known as "English Asia" type release. They are games for SE Asia for countries outside Japan, Taiwan and China, often will just be English versions with different barcodes. Also older games were known as Hong Kong versions, fit into AS categories.
Simply, Chinese text/rating goes into CN.
It is confusing at times, even for say Sega. They did make versions specifically for Taiwan (for example) but also there were some general Asia release versions to. If you ever buy a game and you are not sure which it is, you can make a thread to ask and we can see if we can tell what exactly you have.