Yes According to the public information inquired, the primary and secondary cards of the credit card are shared. When the amount of the secondary card is brushed off, the amount of the primary card will be reduced accordingly. The credit limit of a credit card is different from that of a supplementary card. The credit limit of the main card is the total credit limit of the cardholder, and the credit limit of the auxiliary card is determined by the cardholder of the main card, and the maximum credit limit cannot exceed the main card.