Police dogs trained in drill in Harbin, NE China(1/9)

A police dog acts in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog jumps in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog is trained in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog sniffs in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog is trained in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog is trained in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog is trained in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

Police dogs and trainers are seen in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)

A police dog is trained in a drill in Harbin, northeast China's Heilongjiang Province, May 30, 2019. (Xinhua/Liu Song)