The exercise ZAPAD/INTERACTION-2021 kicks off at a combined arms tactical training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region on August 9, 2021. Pictures show that the participating troops from China and Russia parade at the launch ceremony in 13 ground phalanxes, together with two air echelons. (eng.chinamil.com.cn/Photo by Liu Fang)