Hello, whether it is through the China Merchants Bank "Credit Card Mall" or taking the China Merchants Bank credit card to a physical store to directly pay for installments, the China Merchants Bank credit card only serves as a payment medium. For after-sales service and warranty of specific products, you can contact the merchant directly. The merchant will usually issue a formal invoice and warranty card, which can be used as a voucher to enjoy after-sales service. The specific after-sales details can be confirmed with the merchant.