Illegal, bank: It is illegal to trade foreign currency privately. According to Yu, the office of China Bank Guangxi Branch, according to national laws, foreign currency cannot be freely exchanged. In order to make it as convenient as possible for cardholders, in addition to banks, some hotels, restaurants or shops can also exchange foreign currency for RMB, but it is illegal to conduct foreign currency transactions privately. You can carry your personal ID card for small remittance. But you have to go to the bank. You can't exchange it privately. There are also a large number of counterfeit foreign currency. If you must use it overseas, it is recommended to get a dual-currency bank card. There are many foreign shopping cards, and basically foreigners use them to do business.