In fact, the symbol of ICBC is peony, so ICBC cards are all peony cards, but peony credit cards, peony smart cards and so on are all divided. Whether it is a credit card or not depends on whether you can overdraw it, and it is necessary to distinguish what kind of credit card it is, whether it is a debit card or a quasi-credit card. There is a difference between the two. Peony credit card seems to have only CVV. CVV is the card verification value, and MasterCard is called the card verification code (CVC). VISA CVV and MC CVC are 3-digit or 4-digit numbers generated by card number, expiration date and service constraint code, which are generally written in the 2-track custom data area of card magnetic stripe. CVV and CVC are generated in the same way, but they are called in different ways. CVV2 is a number printed in the signature area of Visa/MasterCard card. It is located in the 3 digits after the credit card number. The last three digits we usually see on the back of a credit card are actually CVV2, not CVV code.