The money on the supplementary CCB credit card can be used with the main card. The main credit card and supplementary card of China Construction Bank's credit card enjoy credit limit. The main cardholder can specify a separate card limit for the supplementary card that is no higher than the main card. If the supplementary cardholder makes purchases or withdraws cash through the credit card, the available limit of the main card will be reduced accordingly. In other words, the money on the supplementary CCB credit card is set by the main cardholder, and the limit is shared with the main card. Therefore, the money on the supplementary CCB credit card can be used on the main card.