A Y-20 large transport aircraft attached to an aviation division under the PLA Western Theater Command flies at a predetermined altitude during a flight training mission on January 4, 2021. (eng.chianmil.com.cn/Photo by Liu Shu)

A Y-20 large transport aircraft attached to an aviation division under the PLA Western Theater Command flies at a predetermined altitude during a flight training mission on January 4, 2021. (eng.chianmil.com.cn/Photo by Liu Shu)

Pilots and crew members assigned to an aviation division under the PLA Western Theater Command get ready for a flight training mission on January 4, 2021. (eng.chianmil.com.cn/Photo by Liu Shu)

A Y-20 large transport aircraft attached to an aviation division under the PLA Western Theater Command taxies on the runway during a flight training mission on January 4, 2021. (eng.chianmil.com.cn/Photo by Liu Shu)

A Y-20 large transport aircraft attached to an aviation division under the PLA Western Theater Command taxies on the runway during a flight training mission on January 4, 2021. (eng.chianmil.com.cn/Photo by Liu Shu)