Multiple types of helicopters attached to a brigade under the Chinese PLA 76th Group Army take off during a round-the-clock training exercise. (eng.chinamil.com.cn/Photo by Li Xiaoxiao)

Multiple types of helicopters attached to a brigade under the Chinese PLA 76th Group Army take off during a round-the-clock training exercise. (eng.chinamil.com.cn/Photo by Li Xiaoxiao)

Multiple types of helicopters attached to a brigade under the Chinese PLA 76th Group Army take off for nighttime flight training during a round-the-clock training exercise. (eng.chinamil.com.cn/Photo by Yang Chenghao)