Hefei Feidong Health Station generally needs to be isolated for 7 days to enter. According to the official information about the inquiry, the person who came to the fertilizer should go to declare in advance, check the double code, hold the negative certificate of nucleic acid test within 48 hours, and conduct centralized isolation for seven days after landing. As of June 27th, 2022, people who have lived in the middle-risk area for nearly 7 days were observed in isolation medicine for 7 days, and their nucleic acids were detected at 1, 4 and 7 days respectively. People who have lived in high-risk areas for 7 days were isolated for medical observation for 7 days, and nucleic acid was detected for 1, 2, 3, 5 and 7 days. The management period starts from leaving the risk area.