Sailors assigned to a destroyer flotilla with the navy under the PLA Southern Theater Command heave the mooring line aboard the guided-missile destroyer Shenzhen during an astern replenishment-at-sea with another vessel during a round-the-clock maritime training exercise on such subjects as live-fire operation, alongside replenishment-at-sea, ship maneuvering and so forth, in waters off the South China Sea in late May, 2019. (Photo: eng.chinamil.com.cn)

Sailors assigned to a destroyer flotilla with the navy under the PLA Southern Theater Command heave the mooring line aboard the guided-missile destroyer Shenzhen during an astern replenishment-at-sea with another vessel during a round-the-clock maritime training exercise on such subjects as live-fire operation, alongside replenishment-at-sea, ship maneuvering and so forth, in waters off the South China Sea in late May, 2019. (Photo: eng.chinamil.com.cn)

A sailor assigned to a destroyer flotilla with the navy under the PLA Southern Theater Command throws a mooring line aboard the guided-missile destroyer Shenzhen during a round-the-clock maritime training exercise on such subjects as live-fire operation, alongside replenishment-at-sea, ship maneuvering and so forth, in waters off the South China Sea in late May, 2019. (Photo: eng.chinamil.com.cn)

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

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

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. (Photo: eng.chinamil.com.cn)