Police dogs are trained at a railway police dog training base in Nanning, capital of south China's Guangxi Zhuang Autonomous Region, Jan. 11, 2017. Police dogs are allocated to travelling stations during the annual Spring Festival travel rush, when most of the Chinese people return to their hometown for family reunion. The Spring Festival, or Chinese Lunar New Year, falls on Jan. 28 this year. (Xinhua/Lu Boan)