The guided-missile destroyer Shenzhen (Hull 167) attached to a destroyer flotilla with the navy under the PLA Southern Theater Command fires its close-in weapons system at mock sea targets during a round-the-clock maritime training exercise on such subjects as live-fire operation, alongside replenishment-at-sea, ship maneuvering and so on in waters off the South China Sea in late May, 2019. (eng.chinamil.com.cn/Photo by Li Wei)