High-risk area: medium-risk area: Jinyuan Shi Jia Community in Jindu Street, Donghong Yijing Community (Phase I, II, III and IV), Sunshine Mingyuan Community in Xinglong Town, Yuehe New City Community, Lijing Community in Bayan Town Park, Building A of Xinyuan in Xinheng Modern City Community, Yunshui New City Community in Bayan Town, Shenglong International Community in Bayan Town, and No.65 Courtyard of Hexing Road in Zheng Wen Street. Those who return to Zhoushan rural areas from low-risk areas in Shanghai need to provide negative proof of nucleic acid detection within 7 days. For those who can't provide it, they should immediately go to the comprehensive service point for nucleic acid detection and daily health monitoring for 14 days, and they should not go out or gather unless necessary; Be sure to do personal protection when going out. Nucleic acid detection was carried out on the 7th and 4th day after returning to China. For those whose return time is less than 14 days, daily health monitoring and nucleic acid detection requirements shall be implemented according to the actual return time. Returning to rural areas from low-risk areas outside the province requires negative proof of nucleic acid test within 7 days. For those who can't provide it, they should immediately go to the comprehensive service point for nucleic acid detection and daily health monitoring for 14 days, and they should not go out or gather unless necessary; Be sure to do personal protection when going out. Nucleic acid detection was carried out on the 7th and 4th day after returning to China. For those whose return time is less than 14 days, daily health monitoring and nucleic acid detection requirements shall be implemented according to the actual return time.