If you apply for a China Merchants Bank credit card, it is different. The main card is applied for yourself, and the supplementary card is applied for by the main card for immediate family members (parents, spouse or children). The supplementary card can enjoy the credit of the main card. The limit (the principal card can set the limit for the supplementary card), the account will be listed in the principal cardholder's statement, and the principal cardholder will pay the account together.