You can be paid in another currency here, but probably only if your employers are based in another country.

Getting paid in RMB is the same as getting paid in $US anyway, as the RMB is pegged to the $US, so the official rate between these 2 currencies never changes (which is good news for some at the moment with the $US the way it is).

Everywhere you go in this country you can change your money from RMB into $US unofficially with no questions asked, and usually at a slightly better rate than the one posted at the bank. These unofficial money changers usually congregate in particular areas such as outside the banks or on major thoroughfares; in some places they even have their own permanent premises in full public view. In fact very often you have no choice but to use the unnofficial route to buy your $US, as the bank will refuse outright to sell you any of theirs.