A J-10 fighter jet attached to an aviation brigade of the air force under the PLA Eastern Theater Command takes off from a military airfield for a sortie during a combat flight training task in mid-September, 2018. (Photos: eng.chinamil.com.cn)

A J-11 fighter jet attached to an aviation brigade of the air force under the PLA Eastern Theater Command takes off from a military airfield for a sortie during a combat flight training task in mid-September, 2018.

A pilot assigned to an aviation brigade of the air force under the PLA Eastern Theater Command prepares to take off during a combat flight training task in mid-September, 2018.

A pilot and a maintenance man jointly go through pre-flight procedures prior to a combat flight training task conducted by an aviation brigade of the air force under the PLA Eastern Theater Command.