Most credit cards used abroad require dual-currency cards, and only a few countries support China UnionPay, so many ordinary credit cards cannot be used abroad.

Dual-currency card: refers to a bank card issued by many domestic banks with RMB and foreign currency settlement accounts and with the logo of UnionPay and another international bank card organization. Dual-currency cartoons often use RMB as the settlement currency in the settlement network of China UnionPay, and foreign currency can be used as the settlement currency in the settlement network of international bank card organizations designated by the overseas dual-currency card logo. (Of course, countries with UnionPay network abroad can also settle in RMB). Dual currency card is a transitional product under the current foreign exchange control in China.

Common international bank card organizations are Visa (Visa), Master (MasterCard) and American Express (American Express), and all three international bank card organizations cooperate with major domestic banks to issue bank cards.