A convoy of military trucks carring HQ-16 medium-range air defense missiles is en route to a designated training field for operations such as equipment unloading, missile lifting and erection, and motorized marching, in northwest China’s Gobi desert on June 2, 2019. They are attached to an air-defense brigade under the PLA 72nd Group Army. (eng.chinamil.com.cn/Photo by Li Xiaopeng)