An anti-submarine patrol aircraft attached to an aviation regiment with the navy under the PLA Southern Theater Command taxies on the runway to get ready for a submarine search training exercise in the middle of March, 2021. (eng.chinamil.com.cn/Photo by Zhang Yingkai)

A ground crew member assigned to an aviation regiment with the navy under the PLA Southern Theater Command guides an anti-submarine patrol aircraft towards the take-off line during a submarine search training exercise in the middle of March, 2021. (eng.chinamil.com.cn/Photo by Zhang Yingkai)

An anti-submarine patrol aircraft attached to an aviation regiment with the navy under the PLA Southern Theater Command takes off from the runway during a submarine search training exercise in the middle of March, 2021. (eng.chinamil.com.cn/Photo by Zhang Yingkai)