2. The health pass code is divided into three colors: red, yellow and green. According to the regulations, "code red" and "code yellow" personnel cannot pass, and medical treatment or observation should be carried out according to the requirements of the epidemic prevention and control department; "Green code" personnel with normal body temperature can pass. In the prevention and control of epidemic situation and resumption of production, health code can realize efficient personnel flow management, improve the inspection efficiency of office buildings, shopping malls, subways, railway stations and other crowded places, and avoid excessive personnel contact and gathering.