Palmprint is also a kind of fingerprint. This hand brush service launched by Amazon is a very novel non-contact payment method. Because the palm print is a kind of fingerprint, it can be guaranteed that there is no same palm print in the world. In addition to payment, this scanning of palm prints can also be used for identity discrimination, such as membership cards. Tickets. You can use this technology. But this technology also needs the corresponding terminal cooperation. With such a terminal, a manual brushing service can be performed. According to statistics, the error resolution of the system is within 1 million. After shopping, at the door or at checkout, you can complete the payment by putting your palm on the corresponding terminal. Amazon system only takes 0.3 seconds, which greatly speeds up the payment time. Now many of our companies use face recognition. Compared with face recognition, hand recognition is a more private and friendly way, because long text is more private than other features, and this hand brushing technology based on the whole palm line can effectively protect people's privacy by identifying people only by the characteristics of palm prints, not by faces, and can get away with it by using other technologies such as video synthesis. Moreover, this time, Amazon's innovative technology will not only input palmprint information, but also contain veins and veins under skin tissue, so it can ensure the uniqueness of the chief information and cannot be copied. In this way, consumers can bind bank cards with palm prints, and only need to extend their palms to verify payment when checking out. Therefore, the advantages of hand brush service are very obvious. The disadvantage is also obvious, that is, it needs to be promoted and the terminal needs to be identified. Without this terminal, it is impossible to promote the hand brush service. As for whether this terminal can rise in China, whether it can be used in China and whether it can be promoted in China, it still faces a lot of follow-up problems, so it is still waiting to see in the domestic hand brush service.