Staff members of Zhengtai Jiayuan community conduct supervision and registration of people entering and leaving the community in Hohhot, capital city of North China's Inner Mongolia autonomous region, on Jan 29. The moves were part of Hohhot's wider efforts in novel coronavirus prevention and control. As of 9 am on Feb 3, four novel coronavirus infection cases have been reported in Hohhot. [Photo/Xinhua] 

Staff members of Juhaicheng community check information on vehicles entering and leaving the community in Hohhot, Inner Mongolia, on Jan 30. [Photo/Xinhua]