This photo taken on May 5, 2016 shows crew members of China's South Sea Fleet taking part in a drill in the Xisha Islands, or the Paracel Islands in the South China Sea. 
Beijing claims sovereignty over almost the whole of the South China Sea, on the basis of a segmented line that first appeared on Chinese maps in the 1940s, pitting it against several neighbours. / AFP / STR / China OUT / TO GO WITH AFP STORY CHINA-POLITICS-MARITIME-DIPLOMACY BY BEN DOOLEY          (Photo credit should read STR/AFP/Getty Images)