Sau oil factory, once an important enterprise in Xiushan County, its production of oil, because of its special features and renowned at home and abroad. Xiuyou, China Geographical Indication Products, which is a kind of high-quality anti-corrosion coating made of traditional craft formula with tung oil as the main raw material. Its color is like tea, transparent and thick. The past has been widely used in ships, farm tools, furniture and beach buildings brushing decoration. With strong adhesion, the film peak tough, dry quickly, moisture, corrosion, rust, acid, alkali-resistant and so on. Oil production has more than 200 years of history, due to social development and historical changes, oil refinery shutdown in 1997.