A policeman patrols at the Guiyang North Railway Station in Guiyang, southwest China's Guizhou Province, Feb. 18, 2020. In order to prevent and control the spread of the novel coronavirus, policemen from the police station of Guiyang North Railway Station have helped measure temperatures of passengers and give assistance to key passengers, as a way to ensure the transportation safety of passengers. (Xinhua/Ou Dongqu)
