Supported currencies. Single-currency credit cards only support one currency, usually RMB. This kind of credit card can only be used domestically or in countries and regions that support RMB settlement. Dual-currency credit cards support two currencies, usually RMB and another international currency, such as US dollars, euros, etc. This kind of credit card can be used domestically or in countries and regions that support settlement in the corresponding currency. When choosing a credit card, you can choose the appropriate credit card type based on your needs and travel plans. If you mainly use it domestically, you can choose a single-currency credit card. If you often need to travel abroad or need to spend money abroad, you can choose a dual-currency credit card to make payment and settlement more convenient.