Yes, if there are multiple CCB credit cards in an individual's name, the credit line is shared. No matter which card is swiped, the available credit lines of other cards will be reduced. For example, if there are three cards, the credit line is 10000 yuan, which means that the total credit line of the three cards is 10000 yuan. If a single card uses 10000 yuan, the other two cards have no credit limit.