A submarine attached to a submarine flotilla of the PLA Northern Theater Command plows through sea water during a combat-oriented training exercise on September 15, 2023. (eng.chinamil.com.cn/Photo by Zhang Nan)
A submarine attached to a submarine flotilla of the PLA Northern Theater Command plows through sea water during a combat-oriented training exercise on September 15, 2023. (eng.chinamil.com.cn/Photo by Zhang Nan)