Photo taken on July 18, 2012 shows a building on Zhubi Reef of south China Sea. A fleet of fishing vessels from China's southernmost province of Hainan departed from Yongshu Reef on Tuesday night. The fleet arrived at Zhubi Reef at about 10 a.m. Wednesday. The fleet of 30 boats, the largest ever launched from the island province, planned to fish and detect fishery resources near Zhubi Reef. [Xinhua]