What's the currency used in China? What's the exchange rate between your currency and US dollar?

The official currency in mainland China is the Renminbi (RMB) or "People's currency." The basic unit is the yuan (also known as ‘kuai’), which equals 10 jiao (or ‘mao’), which is then divided into 10 fen. Paper currency comes in 1, 2, 5, 10, 20, 50 and 100 yuan notes, paper jiao comes in denominations of 1, 2 and 5. There are also 1 and 2 fen notes, but these are rarely used as their purchasing power is almost zero. As for coins, there are 1 yuan, 1 and 5 jiao, and 1, 2 and 5 fen (again, the fen coins are basically useless).