It's a Tencent co-branded card. Compared with other types of credit cards, it is an agricultural bank credit card with a Tencent number on it, which is a joint card of the bank credit card. Also called Tencent co-branded card, because it means to cooperate with Tencent to promote, so that novices who are not familiar with Tencent QQ number can remember their Tencent identity number. The secondary card is used to apply for multiple cards, and the second secondary card. The secondary card can be their own or their relatives', but compared with the primary card, the primary card holder has the right to manage the consumption of the secondary card and the responsibility to manage the debt repayment of the secondary card. If there is no secondary card, the use and repayment methods of consumption and overdraft are the same as those of other credit cards.