A pilot assigned to an army aviation brigade under the PLA 72nd Group Army goes through pre-flight checks on his WZ-10 attack helicopter prior to a round-the-clock combat flight training exercise on April 8, 2020. The flight training exercise focused on subjects such as dogfight, stealth assault and defense operation, coordinated night combat flight and so on. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)