A submarine attached to a naval submarine flotilla under the PLA Northern Theater Command steams in the sea during a training exercise on March 21, 2023. (eng.chinamil.com.cn/Photo by Wu Haodong)
A submarine attached to a naval submarine flotilla under the PLA Northern Theater Command steams in the sea during a training exercise on March 21, 2023. (eng.chinamil.com.cn/Photo by Wu Haodong)