If you use China Merchants Bank credit card, in order to ensure the safety of using the card, the cardholder needs to open the card when receiving a new card (within the validity period of the card), and set a password when opening the card, so that it can be used immediately after the card is opened successfully. Opening a card for a new customer for the first time: click/cmbbank _ creditcardv2/ui/creditcardpc/creditcardv2/cs _ proofactivate.aspx to open the card immediately. After you open the card, please sign in the signature column on the back of the card, which is consistent with the signature on the application form. At the same time, it is also recommended to log in to mobile banking immediately and set the transaction password.