"Health Treasure" is a digital information service tool launched by Beijing Big Data Center to meet the needs of the current epidemic prevention and control in COVID-19, so as to facilitate the general public and people entering (returning to) Beijing to inquire about their health status related to epidemic prevention and to facilitate the city to restore production and life order. Simply put, "Health Treasure" is a small tool for individuals to inquire about their health status related to epidemic prevention, which can be used by all personnel in Beijing and those who enter (return to) Beijing.