Multi-type attack helicopters attached to an army aviation brigade under the PLA 72nd Group Army lift off from the parking apron during a night flight training exercise on April 3. The training included such subjects as ultra-low altitude penetration, search and reconnaissance, vectored attack and low-altitude restriction, aiming to hone the pilots' all-weather combat capabilities. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)

Multi-type attack helicopters attached to an army aviation brigade under the PLA 72nd Group Army lift off from the parking apron during a night flight training exercise on April 3. The training included such subjects as ultra-low altitude penetration, search and reconnaissance, vectored attack and low-altitude restriction, aiming to hone the pilots' all-weather combat capabilities. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)

Multi-type attack helicopters attached to an army aviation brigade under the PLA 72nd Group Army lift off from the parking apron during a night flight training exercise on April 3. The training included such subjects as ultra-low altitude penetration, search and reconnaissance, vectored attack and low-altitude restriction, aiming to hone the pilots' all-weather combat capabilities. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)

Multi-type attack helicopters attached to an army aviation brigade under the PLA 72nd Group Army lift off from the parking apron during a night flight training exercise on April 3. The training included such subjects as ultra-low altitude penetration, search and reconnaissance, vectored attack and low-altitude restriction, aiming to hone the pilots' all-weather combat capabilities. (eng.chinamil.com.cn/Photo by Zhang Huanpeng)