A policeman shows how police dogs work during an open day event held by local railroad police at Wuhan Railway Station, central China's Hubei Province, Jan. 4, 2017. (Xinhua/Cheng Min)
A policeman shows how police dogs work during an open day event held by local railroad police at Wuhan Railway Station, central China's Hubei Province, Jan. 4, 2017. (Xinhua/Cheng Min)