An attack helicopter attached to an army aviation brigade of the PLA 71st Group Army fires air-to-air missile at mock target during a recent round-the-clock live-fire training exercise above China’s Yellow Sea. Pilots' capability has been comprehensively tested and improved during the exercise featured with low altitude operations, in-depth attacks, mixed manned and unmanned operations, and all elements coordination. (eng.chinamil.com.cn/Photo by Xiang Xu)