A fishery administration ship sails to Yongshu Reef of Nansha Islands to assist a fleet of fishing vessel, South China Sea, July 15, 2012. A fleet of 30 fishing vessels arrive at Yongshu Reef of the South China Sea on Sunday. The fleet, departing from Sanya City of south China's Hainan Province on July 12, 2012, will spend 20 days fishing near the Yongshu Reef, sailors of the fleet said.