The Zhengzhou Bank magnetic stripe card number consists of 19 digits, with the first six digits being 622421. The chip card (financial IC card) card number consists of 19 digits, with the first six digits being 623531, which is uniformly given by China UnionPay international card logo. You can use the first six digits of the card number to identify whether the card is a magnetic stripe card or a chip card (except for magnetic stripe cards with the same number), and you can also preliminarily determine whether a bank card is a magnetic stripe card or a chip card based on whether the card has chip media on the card surface.