I have worked in China since last January. Now i got transfer to United States.
I want to exchange some Chinese Yuan (RMB) to US Dollars.
Which bank offer such fast service to foreigner?
Most banks will do this. If you have a account with a bank you have a better chance of having higher limits of exchanging cash.
And when you fly into the US look at the international airport as some will have places to change your cash. But a bank chances are will give you a better rate, but the airport exchanges are convenient if your international airport has one.