UnionPay is a bank card organization in China. With the help of UnionPay, credit cards can be withdrawn from banks in China and spent on POS machines of merchants. At present, many overseas countries such as Singapore and New Zealand also support UnionPay withdrawal and consumption. VISA, MasterCard, JCB and American Express are all overseas credit card organizations, among which the special merchants of VISA are mainly concentrated in North America, Asia Pacific and other regions; MasterCard's special merchants are mainly concentrated in Europe, Southeast Asia and other regions; JCB- Japan Credit Card Co., Ltd., the special merchants are mainly concentrated in Japan; American Express has issued American Express cards in 130 countries and regions, providing advanced card services to more than 7 million cardholders of global1700,000 corporate customers.