3月底，北部战区海军某潜艇支队组织开展海上训练，提升官兵实战能力。（英文中国军网/吴浩东 摄影报道） A submarine attached to a naval flotilla under the PLA Northern Theater Command sails in the waters during the maritime combat training drills in late March, 2022. (eng.chinamil.com.cn/Photo by Wu Haodong)