A naval fleet consisting of the guided-missile frigates Yichang (Hull 564), Daqing (Hull 576) and Handan (Hull 579) steam in formation during a maritime live-fire training exercise at an undisclosed sea area in the Yellow Sea from May 11 to 14, 2018. They are attached to a destroyer flotilla with the navy under the PLA Northern Theater Command. (eng.chinamil.com.cn/Photo by Zhang Hailong)