paying by brushing your face is also needed by society. The development of science and technology reflects people's pursuit of the convenience of life and the improvement of quality. Although Alipay's mobile payment has become the most convenient payment method at present, the appearance of face-brushing payment makes it possible to complete the payment without opening the mobile phone. Presumably, there is nothing more convenient than this payment method at present, not to mention it is more secure. Therefore, paying by brushing your face will also become one of the needs of social development.