Membership cards are widely used in the retail industry. They refer to ordinary ID cards and can be produced using IC cards, ID cards, magnetic stripe cards, barcode cards, etc. Including shopping malls, hotels, fitness centers, restaurants and other consumer place membership certification. They are very versatile and can be applied to identity cards such as schools, clubs, companies, institutions, groups, etc., wherever there is a need to identify identities. A member's card issued by a company is equivalent to a company's business card. A company's logo or logo can be printed on the member's card. Advertising for the company's image is an ideal vehicle for companies to advertise. At the same time, issuing membership cards can also play a role in attracting new customers, retaining old customers, and enhancing customer loyalty. It can also realize functions such as discounts, points, and customer management. It is a feasible way to increase profits.