In order to ensure the security of your card, you need to open a credit card before you can use it; In order to ensure the safety of using the card, the cardholder needs to open the card (within the validity period of the card) when receiving a new card, and can use it immediately after the card is successfully opened. 1. First card opening for new customers: click here/cmbbank _ genshell/ui/genshellpc/login/login.aspx? Logintype=C, open the card right away. 2. To open a card for a customer who has already opened or changed a card, please log in to online banking and click "Card Management-Credit Card Opening". Click here to log in now. After opening the card, please sign in the signature column on the back of the card and check with it.