Chinese oil rig Haiyang Shi You 981 is seen surrounded by ships of China Coast Guard in the South China Sea, about 210 km (130 miles) off shore of Vietnam May 14, 2014. REUTERS/Nguyen Minh/Files
Chinese oil rig Haiyang Shi You 981 is seen surrounded by ships of China Coast Guard in the South China Sea, about 210 km (130 miles) off shore of Vietnam May 14, 2014. REUTERS/Nguyen Minh/Files