Transport helicopters fly at an extremely-low altitude before landing in the China-Russia joint military exercise ZAPAD/INTERACTION-2021 at a training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region from August 9 to 13, 2021. (Photos: eng.chinamil.com.cn)

The assault vehicles "Lynx" rush out from the landed military helicopters to conduct coordinated operations in the China-Russia joint military exercise ZAPAD/INTERACTION-2021 at a training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region from August 9 to 13, 2021.

The armed helicopters and the assault vehicles "Lynx" coordinated in the defense penetration operations during the China-Russia joint military exercise ZAPAD/INTERACTION-2021 at a training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region from August 9 to 13, 2021.

Special operations soldiers conduct fast-roping in the China-Russia joint military exercise ZAPAD/INTERACTION-2021 at a training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region from August 9 to 13, 2021.

An armed helicopter fleet launches an assault on the defense works and firing points of the mock terrorists during the low-altitude defense penetration operations in the China-Russia joint military exercise ZAPAD/INTERACTION-2021 at a training base of the PLA Army in Qingtongxia City of West China's Ningxia Hui Autonomous Region from August 9 to 13, 2021.