Pilots assigned to an army aviation brigade under the PLA 80th Group Army make pre-flight check in the WZ-10 attack helicopters during an actual combat flight training exercise in east China's Shandong Province on June 10, 2020. (eng.chinamil.com.cn/Photo by Li Qiguang)

Pilots assigned to an army aviation brigade under the PLA 80th Group Army make pre-flight check in the WZ-10 attack helicopters during an actual combat flight training exercise in east China's Shandong Province on June 10, 2020. (eng.chinamil.com.cn/Photo by Li Qiguang)