Type-054A guided missile frigate Bayannaoer (Hull 551) attached to a naval frigate flotilla under the PLA Southern Theater Command fires its secondary gun at mock sea targets during a joint maritime drill on May 7, 2023. The four-day joint drill focused on subjects of weapon handling, damage control, warship maneuver in formation, etc., in a bid to improve the troops' quick response and coordination capabilities. (eng.chinamil.com.cn/Photo by Cai Shengqiu)