Single currency credit card is a credit card with a single settlement currency, and traditional credit cards belong to this type. \x0d\ Dual-currency credit cards are mainly for the convenience of consumption abroad, and are of little significance to domestic residents unless they go to duty-free shops for consumption. \x0d\\x0d\ The other currency of dual currency must be freely convertible in the international market, such as USD, JPY, EUR, etc. \ x0d \ x0d \ ATM/POS machines in each country can only withdraw/swipe local currency, and China has foreign exchange control, so RMB credit cards cannot be used abroad. Dual-currency credit card holders can spend money abroad, because the foreign currency in circulation can be freely exchanged, so as long as there is a foreign currency (such as US dollars), the cardholder's capital needs in any country can be met. Since it is a single currency, it should only be aimed at the US dollar!