Beijing "Health Treasure" applet is a small tool for individuals to inquire about health status related to epidemic prevention. You can search for the "Beijing Health Treasure" applet through WeChat and Alipay to check your health status. The query results can be used as a reference for your health status related to epidemic prevention in scenes such as returning to work and going in and out of public places. The scan code registration function of Beijing "Health Bao" can be used to register visitors in and out of public places such as business buildings, supermarkets, restaurants and various stores, including visitor information registration and personal information scan code registration. Providing electronic registration service for website managers and visitors can replace paper registration and avoid contact infection and personal privacy disclosure.