The currency is the renminbi (RMB). The basic unit of currency is the yuan. It is illegal to use foreign currency. Foreign currency should be exchanged at officially approved government facilities only. Any amount over US$5,000 in cash (or equivalent in foreign currencies) must be declared at customs upon arrival in China. The declaration record must be retained to show officials upon departure. Permission is required from a Chinese bank in order to leave with amounts between US$5,000 and US$10,000 (or equivalent in foreign currencies). Travellers are reminded that those who abuse foreign currency regulations will be punished according to Chinese law. Traveller's cheques can be exchanged at most hotels. Credit cards are accepted in hotels and some larger shops. Check with your bank for information on ATM services in other countries or VISA and Mastercard for the addresses of ATMs around the world. Your bank can advise if you need a new Personal Identification Number (PIN) for overseas access to your account. Credit cards and debit cards should be used with caution due to the potential for fraud and other criminal activity. Use an ATM during business hours inside a bank, supermarket, or large commercial building. Leave copies of your card numbers with a family member in case of emergency.