To understand what a diamond card is, we must first know what a UnionPay card is. First of all, UnionPay card is a bank card with the card number beginning with 62 and the UnionPay logo printed on the card surface, which was jointly launched by China UnionPay and commercial banks. Then UnionPay cards can be subdivided into ordinary cards, gold cards, platinum cards and diamond cards according to the card level and service authority. In other words, the diamond card is the card with the highest level and the most service rights, and it is the most advanced credit card. Its target customers are mainly social elites and professional elites. The card will have the identification pattern of "diamond" diamond card products. Black and black with metallic and pearlescent luster are usually used as the basic colors of cards, which is the legendary "black card".