Two pilots assigned to an aviation brigade of the air force under the PLA Southern Theater Command sit in the cockpit of a J-10 fighter jet awaiting takeoff during an aerial combat flight training exercise on November 28, 2019. (eng.chinamil.com.cn/Photo by Wei Jinxin)

Pilots assigned to an aviation brigade of the air force under the PLA Southern Theater Command taxi a J-10 fighter jet on the tarmac during an aerial combat flight training exercise on November 28, 2019. (eng.chinamil.com.cn/Photo by Wei Jinxin)

A J-10 fighter jet attached to an aviation brigade of the air force under the PLA Southern Theater Command soars into the air for an aerial combat flight training exercise on November 28, 2019. (eng.chinamil.com.cn/Photo by Wei Jinxin)