A worker works beside the super oil tanker christened "Jiu Hua San" in Shanghai October 18, 2009. The 319,000-deadweight-ton oil carrier built by Shanghai Waigaoqiao Shipbuilding Co. Ltd is the largest under the structural rules formulated by the International Association of Classification Societies Ltd. (IACS), and it will be delivered to Singapore-based Ocean Tankers Pte Ltd. [Xinhua]