Cannot be transferred to a supplementary card. The supplementary card of China Merchants Bank Credit Card is applied for by the main card for immediate family members (parents, spouse or children). The supplementary card can enjoy the credit limit of the main card, and the accounts will be listed uniformly in You will pay the balance included in your statement. Applicants can apply for the main card and supplementary card at the same time, and apply for the supplementary card separately. The main cardholder must already hold the card.