Chinese frigate "Huangshan" and Russian Navy's Antisubmarine Ship "Admiral Tributs" sail to a target area during a China-Russia naval joint drill at sea off south China's Guangdong Province, Sept 16, 2016. Chinese and Russian fleets conducted joint operation exercise off Guangdong Province in the South China Sea during the "Joint Sea 2016" drill on Friday. The drill, starting on Sept 12, will run until Sept 19, consisting of three phases: preparation at port, exercise at sea and summary. [Photo/Xinhua]