Generally speaking, credit cards issued by the same bank will give you a credit limit based on the number of cards issued to you. Generally, the more cards you have, the lower the credit limit. You can combine two credit cards for repayment to a certain extent, but it is not recommended. You will owe a lot in the end and it will be difficult to repay. If you just want to extend the period of interest-free borrowing. You can go shopping on Taobao and transfer it to another account to withdraw it. When the repayment period comes, cash out the other card and repay it in the same way, and then continue. If your money has been used, you can only repay the minimum amount. If you continue to pour money out, you will owe more and more in the end. It is not recommended to overdraft your money like this.