Legal basis: According to the Work Plan for the Prevention and Control of COVID-19 Epidemic in Rural Areas in Winter and Spring, returnees should return to China with valid negative results of COVID-19 nucleic acid test within 7 days, and monitor at home for 14 days after returning home. During this period, there will be no aggregation and no flow, and the nucleic acid will be tested every 7 days. All townships (streets) and administrative villages (neighborhood committees) shall implement the responsibility system, implement grid management for returnees, and do a good job in registration, health monitoring and abnormal situation handling. Use traditional media and new media to publicize the knowledge and measures of prevention and control of new coronary pneumonia, guide returnees to abide by epidemic prevention and control regulations, truthfully report their personal trips, actively cooperate with health monitoring, enhance villagers' sanitary habits such as washing their hands frequently, keeping indoor ventilation, wearing masks in closed places, and enhance their awareness of seeing a doctor and reporting immediately after symptoms such as fever, dry cough, sore throat, decreased sense of smell and diarrhea appear.