• Linyi Aosen Chemical co.,ltd was founded in 1999, is specializes in manufacturing various chemicals and chemical materials for international market. We have more than 20 intermediate and senior engineers, more than 200 workers, the most updated production and test equipment in the world and intact, scientific quality management system. Our factory is located in Linyi which is the biggest chemical producing base of north China and cover an area of more than 30000 square meters.