Soldiers assigned to an army aviation brigade under the PLA Xinjiang Military Command unload supplies from the back ramp of a Mi-171 transport helicopter after landing at the parking apron at a military post deep in the Altai Mountains along China-Mongolia border area in Altay of northwest China’s Xinjiang Autonomous Region in late June, 2019. (Photo: eng.chinamil.com.cn)

Pilots assigned to an army aviation brigade under the PLA Xinjiang Military Command navigate a Mi-171 transport helicopter through the valley to transfer 10 soldiers to a military post deep in the Altai Mountains along China-Mongolia border area in Altay of northwest China’s Xinjiang Autonomous Region in late June, 2019. (Photo: eng.chinamil.com.cn)

Pilots assigned to an army aviation brigade under the PLA Xinjiang Military Command navigate a Mi-171 transport helicopter through the valley to transfer 10 soldiers to a military post deep in the Altai Mountains along China-Mongolia border area in Altay of northwest China’s Xinjiang Autonomous Region in late June, 2019. (Photo: eng.chinamil.com.cn)

Pilots assigned to an army aviation brigade under the PLA Xinjiang Military Command navigate a Mi-171 transport helicopter through the valley to transfer 10 soldiers to a military post deep in the Altai Mountains along China-Mongolia border area in Altay of northwest China’s Xinjiang Autonomous Region in late June, 2019. (Photo: eng.chinamil.com.cn)

A Mi-171 transport helicopter carrying 10 soldiers prepares to land near a military post deep in the Altai Mountains along China-Mongolia border area in Altay of northwest China’s Xinjiang Autonomous Region in late June, 2019. (Photo: eng.chinamil.com.cn)