The Chinese currency is called RMB (“renminbi” in Chinese pronunciation). It still not a free-market convertible currency, but conveniently you can use ATM machines in major banks in China to get the local currency using your standard ATM cards from the US or European countries.
The denominations of the currency are: Yuan, Jiao (1 jiao=0.1yuan) and Fen (1 fen=0.01 Yuan). In the past, the conversion rate of Chinese currency to US Dollars has been fixed at about 1 USD=8 RMB Yuan, but in recent years, with the change of policy and appreciation of the Yuan, right now it’s about 1 USD=7.5 RMB Yuan. Please check with many US banks’ web sites for daily conversion rate. You may also use some of the web tool like this: Money Converter
To help some first time tourists, below are some images of the Chinese paper bills (not in actual sizes):




Below are some of the commonly seen Chinese coins of 1 Yuan, 50 fen(0.5 Yuan), 5 fen (0.05 Yuan), 2 fen(0.02 Yuan) and 1 fen(0.01 Yuan):
