Helicopters attached to a unit with the air force under the Chinese PLA Southern Theater Command park on the tarmac and get ready for a round-the-clock flight training exercise in mid-December. (eng.chinamil.com.cn/Photo by Jiang Zeying, Lei Jian and Yan Shisong)
近期，南部战区空军某部连续组织多场次、多机型、跨昼夜直升机实战化演练。（英文中国军网/蒋泽营、雷健、严石松 摄）