A Z-9 attack helicopter attached to an air assault brigade with the PLA airborne troops flies at ultra-low altitude in preparation for a defense penetration operation during a round-the-clock live-fire flight training exercise focusing on stealthy penetration, formation assault and other actual combat operations in the hinterland of the Dabie Mountains of central China’s Hubei Province in mid-April, 2019. (eng.chinamil.com.cn/Photo by Deng Xiaoning and Xuan Shihao)
Source：China Military Online
