CCB's credit card does not charge an overrun fee. When the limit is used up and exceeded, the limit display will be negative. When the limit is exceeded, the card cannot handle some businesses, such as installment and temporary adjustment, but as long as the repayment is received, the over-limit status will be lifted and no over-limit fee will be charged. That is, if the use exceeds the limit, the repayment can still be made on time after the checkout.