All the credit lines of CCB under the same cardholder's name are shared ~ that is to say, if the credit line of card A is 1W and the credit line of card B is 1W, if card A has used 5K, card B can use 5k again; If A card runs out, B card has no available credit limit, and vice versa. However, the repayment should be separated, and it should be paid separately according to the card number ~