Why did Hanzhong close the city?

Someone in Fengcheng, Hanzhong was diagnosed. Sealed areas: Group 8 of Xizhengying in Longjiang Office, Group 3 of Longjiang Village in Longjiang Office, Resettlement Area on the west wing of Cuiping Road in Longjiang Office, Putuo Village Cooking School District in Puzhen, Fenghui Park Community, Yujing Du Ming Community, Railway Hospital and its surroundings, Jinjiang Hotel and its surroundings, Gome and its surroundings in Renmin Road, Xingzhou Community in Shima Road, Garden Lane 133 in Yintan Road, relatives courtyard of Qianjin Road and Du Jia in Shima Road Times. Cuiping Road Blue Sky New Town Community, Ye Jiaying Shidong Group, West Ring Road Local Architect's Family Courtyard, East First Ring Road Xuefu Garden Community, Wangjiang Road Huafu Community, Qianjin Road Huangjiatang Community, Qinglong Guanhudong Group, Qinglong GuanDong Qing and Qingxi Group, Qianjin Road Sanli Village Xiexiang, Shimalu New Building Materials Family Courtyard, Wangjiang Road Oriental Pearl Community, Cuiping Road Harmonious Sunshine Community, Qili Office Wangjiashan Community, Qili Office Harmony.