Police dogs prepare for national competition in Chongqing (1/6)

A police dog receives training in southwest China's Chongqing municipality on July 24, 2014. To prepare for the national detector dog competition, police dogs in Chongqing are in pre-competition trainings, including finding people and sniffing out drugs and explosives. The competition, held once every four years by Ministry of public security, will kick off in October. [Photo/Zhong Xin]