All personnel who enter and return to Shanxi from outside the province must have a negative nucleic acid test certificate within 48 hours. ? For those who have lived in medium-high risk areas and key epidemic areas (adjusted dynamically according to the judgment) within 14 days, red team will be given, and the "first landing point" control will be implemented, and point-to-point return will be implemented, and "14+7" centralized isolation medical observation will be implemented. At the same time, it needs to be traced back to 7 days from the date when the local risk level is adjusted. Those who have reported cases within 14 days but have not adjusted the risk level will be given a yellow code, controlled by the "first drop point", returned point to point, and implemented "7+5" isolated medical observation at home or health station. At the same time, it needs to be traced back to 7 days after the date of local case report. For those who have lived in other epidemic-free areas and returned to Shanxi, "nucleic acid sampling+antigen detection" will be carried out at the first landing point. If the antigen test is negative, take it and chase it. Don't take it back from point to point. Wait at home or in the station before the nucleic acid test results come out. If the result of nucleic acid test is negative, it can flow under the premise of personal protection to avoid aggregation, and carry out nucleic acid test twice every 24 hours after landing ("three days and three tests"). If the tester fails to assign the yellow code on time, they will decode and transcode after the test as required. If the antigen test is positive, it will be immediately transported to a centralized isolation hotel for nucleic acid testing twice every 24 hours. After all the test results are negative, the isolation will be lifted. If the case overlaps with the case being kept (transferred), it should be given the code in time, investigated quickly, and controlled by classification. (2) In cities with epidemic situation in the province, local counties (cities, districts) should scientifically and accurately assign red and yellow codes to personnel in the "three districts" according to the delineation of closed control zones, control zones and prevention zones, and implement classified control measures; Personnel in counties (cities, districts) where high-risk areas are located and counties (cities, districts) where cases have been reported within 14 days but the risk level has not been adjusted are strictly restricted from leaving the country; Other counties (cities, districts) in this city hold the negative certificate of nucleic acid detection and the green code of health code to flow in an orderly manner within 48 hours. People in cities with no local epidemic in the province flow in an orderly way with health codes and green codes. All localities should implement provincial policies in a unified manner, and they should not "increase the number of layers".