Please pay close attention to the development of domestic epidemic situation, do not leave the country unless necessary, do not go to medium and high-risk areas and epidemic-related areas in China, and people in medium and high-risk areas and local cities do not come to Zhang unless necessary. Persons with fever and health code "yellow code" should fulfill their personal protection responsibilities, cooperate with health monitoring and nucleic acid detection, and do not go out until the risk of infection is eliminated.