yes. if you have two credit cards, it doesn't matter which one you put in if it's a supplementary card and a regular card. anyway, it's an account. if the two card numbers are different, it's different. If you make a mistake if you want to return it or not, there must be a handling fee if you take out the money from which card. However, you should pay attention to one thing. If the credit limit of the card you have returned is not small, there will be no charge. It is the same as that of an ordinary savings card. For example, the credit limit on this card is 1, yuan. Then you have paid 3, yuan, which is the credit limit. The other 3, yuan belongs to the savings limit. You take out yourself. Money won't generate interest and charge all fees/but if you are at the counter of another bank, you have to charge for inter-bank cash withdrawal. Generally, you won't take too much money, about 1, 2 yuan.