Good advice, "never be desperate in China". That means arrive with sufficient funds available to you to pay for:
1) a one-way air ticket back to where you came from, say the equivalent of up to 10,000 RMB in your country's currency.
2) your contract's breech penalty, could vary between 500 and 1,000 USD, according to your contract.
3) medical treatment for serious illness, say the equivalent of 10,000 RMB in your country's currency.

By the way, don't expect your country's consulate to lend you money in a timely fashion to help you out - you'll be told to contact your friends and relatives for financial assistance as your first move!