I don't know which bank your credit card belongs to. \x0d\ The credit card limit of general banks can be shared, but it can only be used after the card is opened. If only one card is activated, the other card cannot be used. \x0d\ When the credit lines of the two cards are different, if the high credit line is 10000 and the low credit line is 5000, the total credit line of the two cards is only 10000, whichever is higher. \x0d\ Regarding repayment, some banks only need to return one card, while others need to return two cards respectively. You can call the bank's service telephone for consultation. \x0d\ I hope I can help you.