The credit card has the cardholder's name and expiration date, the card number is 16, and the signature column on the back of the card has 7 digits (card number suffix +CVV2 verification code); Debit cards have a long validity period (generally not marked or marked for 49 or 99 years), and CVV2 code is definitely not. Generally, there is no name, and the card number is basically a plane number of 19 digits.