if your limit is 7 yuan, then the maximum amount you can overdraw is 7 yuan. You can log on to the credit card website of CCB, click "Billing Points Inquiry", and enter your card number and telephone banking password, so you can find out how much credit is available on your card, and you can spend it within the available credit.

in general, what will occupy your quota? 1. You have multiple credit cards under the name of CCB. Because the credit limit is * * *, the use of other cards will also affect your credit limit. 2. You have done the installment. If you have done the installment, the installment amount will occupy your credit line.

generally speaking, these two reasons are more. If these two reasons are not, you obviously have enough available quota, but you can't brush it. You can contact CCB customer service to find out the specific reasons.