![](/MEDIA/PhotosChina/_attachment/2021/08/13/10075523_17b3ee1e46d10075523024.jpg)
A cluster of attack helicopters attached to a brigade under the PLA 81st Group Army lift off successively and fly to a predetermined operational area at ultra-low attitude during a live-fire combat training exercise on July 28, 2021. (eng.chinamil.com.cn/Photo by Chen Kai)