[athgeo]

A cursory search turned up this thread CSDN => http://bbs.csdn.net/topics/370249613 (CSDN being a popular IT forum in China - another one that you may want to research is iteye.com).

According to the author, paid apps are hard to make money off. It appears advertising is the easiest way to monetize apps. Post '#2' has a list of ad networks. Post '#28' enumerates popular Android markets.

As for your second question, it is probably no problem. You just need to sign up with one of the many Chinese equivalents of Paypal. I'm sure there are then ways you can get the funds transferred to your account.