It depends on which bank credit card you have. Generally speaking, it's ok. Take Bank of Communications credit card as an example. There is a single currency credit card. You can apply for a credit card by clicking on official website (the credit card is marked official website), and then an interface will appear asking if you are an old customer. If you choose Yes, you can set up another type of credit card according to the process. Dual-currency cards are marked with visa or master. You can apply for this card 100% and share the quota with your original card. Other banks are similar. If you don't have it on official website, you can call customer service to ask, but the salesman generally won't handle it for you, because there is no commission for the second card, and they are under great work pressure. Pure hands, please adopt.