A KJ-500 airborne early warning (AEW) aircraft attached to an aviation brigade of the air force under the PLA Western Theater Command takes off for a combat sortie during the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)

Maintenance men assigned to an aviation brigade of the air force under the PLA Western Theater Command go through pre-flight procedures on a J-11 fighter jet prior to the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)

Maintenance men assigned to an aviation brigade of the air force under the PLA Western Theater Command go through pre-flight procedures on a J-11 fighter jet prior to the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)

Weapons load crew airmen assigned to an aviation brigade of the air force under the PLA Western Theater Command transfer missiles of J-11 fighter jets prior to the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)

A pilot assigned to an aviation brigade of the air force under the PLA Western Theater Command pilots his J-11 fighter jet to conduct fire strike during the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)

A J-11 fighter jet attached to an aviation brigade of the air force under the PLA Western Theater Command deploys its drogue parachute to slow itself after landing at a military airfield during the flight training exercise in the hinterland of the Kunlun Mountains in early September, 2018. (eng.chinamil.com.cn/Photo by Xi Bobo and Ma Peng)