As you said, this situation cannot be changed. If necessary, you can apply for a dual-currency credit card from the bank again. Because the concepts of single-currency credit card and dual-currency credit card are different, they cannot be converted from one to the other. The meaning of single currency and dual currency refers to whether the functional currency of credit card is one or two. Single currency means that only one currency can be used for settlement. Dual currency can be settled in two currencies.

The common single-currency credit card in China is UnionPay card, that is, RMB single-currency card. Use this card to settle accounts, whether in the supermarket or in the bank, you must settle in RMB.

The common dual-currency credit card in China is RMB+USD card, which has both UnionPay logo and VISA or MasterCard logo on its face. Dual-currency credit cards are generally settled in RMB in China and in US dollars abroad. Even if the settlement currency in this country is not US dollars, the bank will automatically convert it into US dollars for you, and the bill you receive will still be displayed in US dollars.