Pilots assigned to an aviation brigade of the air force under the PLA Southern Theater Command perform last minute inspections after closing the canopy of their J-10 figjhter jet prior to a training sortie on June 6, 2019. (Photo: eng.chinamil.com.cn)

Two J-10 fighter jets attached to an aviation brigade of the air force under the PLA Southern Theater Command take off simultaneously for a training sortie on June 6, 2019. (Photo: eng.chinamil.com.cn)

An airman assigned to an aviation brigade of the air force under the PLA Southern Theater Command pilots his J-10 fighter jet to taxi on the runway during a training sortie on June 6, 2019. (Photo: eng.chinamil.com.cn)

A J-10 fighter jet attached to an aviation brigade of the air force under the PLA Southern Theater Command takes off for a training sortie on June 6, 2019. (Photo: eng.chinamil.com.cn)