If you need to check the card number of a card, you can bring your ID card to any branch of China Merchants Bank to print the account certificate, which will display the card number; If there are users of Netcom Universal Edition (need to register and associate a card), you can query the associated card number after logging in; In order to prevent others from impersonating you to inquire about your information through telephone or online channels, you are only allowed to inquire about the card number of a card at the counter;