A control tower commanding personnel gives orderto the awaiting attack helicopters prior toa round-the-clock live-fire flight training exercise focusing on stealthy penetration, formation assault and other combat operations near 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
