No need for isolation. Xichang is now a low-risk area. According to relevant information, on September 28th, 2022, the returnees in the middle and high risk area were isolated until they left the risk area 14 days. During the isolation period, nasopharyngeal swab nucleic acid detection 1 time was completed every three days, and double collection and double examination were taken when the isolation was lifted. During the period of isolation, the middle and high risk areas were reduced to low risk areas, and the isolation was lifted after the double collection and double test of nucleic acids were negative.