When applying for a credit card, a master card applicant may apply for no more than two supplementary cards for his spouse, parents or children with full civil capacity. The master card holder has the obligation to urge the supplementary card holder to abide by the Peony Credit Card Charter and the relevant provisions of this contract, and bear all losses caused by the supplementary card holder's violation of relevant provisions. The claimant of the primary card has the right to apply for cancellation of the secondary card or stop using the secondary card at any time, and shall bear all debts incurred under the secondary card.

In short, the principal cardholder has all the rights to supervise, use or stop all the items enjoyed by the deputy cardholder. The main card is closely related to the sub-card, and it is responsible for the risk of arrears caused by the sub-card.