Beijing New Crown Pneumonia Epidemic Prevention and Control Command. According to the query Beijing prevention and control policy shows, Beijing high-risk groups by the Beijing Municipal New Crown pneumonia epidemic prevention and control command assigned code, health code assigned code refers to when the epidemic appeared, the epidemic prevention and control department will be based on big data and a variety of information research and analysis of different risk levels of the personnel, will be labeled as red or yellow health code. The purpose of the code is to accurately classify and control the risk personnel, itself is also a risk of informing, we do not need to be too nervous, but must pay great attention to, quickly deal with, according to the prompt consciously comply with the provisions of the epidemic prevention and control.