The credit lines of two credit cards in a bank are not separated, and the credit cards handled in the same bank are shared, so the two cards share a credit line. For example, card A has a credit limit of 20,000 and card B has a credit limit of 1000, so the two cards share a credit limit of 20,000. When the credit line of A card is 65438+3000 yuan, the credit line of B card is only 7000 yuan, which is called sharing credit line.