One card with two currencies means that a customer's credit card has two accounts, one is a RMB account (UnionPay) and the other is a US dollar account (MasterCard). This card can also be used abroad. This is the function of MasterCard, because most foreign countries do not have UnionPay, but if they do not go abroad, the MasterCard function (US dollar account) has no practical effect.
MasterCard International established an internationally accepted credit card system in the late 195s and early 196s, and it became popular all over the world. In 1966, a bank card association was formed. In 1969, the bank card association purchased the patent right of MasterCharge, and unified the credit card name and style design of each issuing bank. In the following ten years, the original name of MasterCharge was renamed MasterCard. MasterCard is a household name all over the world. However, thirty years ago, it was only a domestic card in the United States. Its reputation lies in that mastercard international has been providing cardholders with the latest and most complete payment services in the belief of serving cardholders, which has been recognized by cardholders all over the world.