Two fighter jets attached to an aviation regiment under the PLA Air Force soar through the sky in close formation during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)

A fighter jet attached to an aviation regiment under the PLA Air Force taxies to the runway as two pilots watch the fighter jet leaving during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)

A pilot assigned to an aviation regiment under the PLA Air Force climbs into the cockpit of his J-10 fighter jet during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)

Pilots sitting in the cockpit of a fighter jet give thumbs-up to the ground crew before leaving during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)

Pilots assigned to an aviation regiment under the PLA Air Force perform last-minute inspections before closing the canopy during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)

A fighter jet attached to an aviation regiment under the PLA Air Force taxies on the flightline before takeoff during a recent round-the-clock flight training exercise. (eng.chinamil.com.cn/Photo by Yuan Hua)