Two Mi-17 transport helicopters attached to an army aviation brigade under the PLA Xinjiang Military Command lift off from the parking apron for a recent round-the-clock air-ground coordinated training exercise in the context of actual combat at the foot of the Kunlun Mountains in Taklimakan desert of northwest China’s Xinjiang Uyghur Autonomous Region. (eng.chinamil.com.cn/Photo by Wu Shike)