The application scope of health code covers communities, restaurants, hotels, schools, medical care, shopping, cultural tourism, production and processing, transportation and office buildings. To assist the staff in communities, companies, supermarkets and other places to do a good job in epidemic prevention and management. The green code indicates that there is no abnormality and it can pass normally; The yellow code indicates that the information is not perfect, and it needs perfect verification before it can pass, such as measuring body temperature, or the health pass code has expired; Red team said that if it does not meet the travel conditions, it should report to the community, village committee and unit, and notify the local epidemic prevention and control department when necessary.