Yongnian Yongwei Casing Company Limited was established in 1996. Adjacent to the National Road 107, it is located in Yongnian economic development zone, Handan City, Hebei Province. Covering an area of 12,000 square meters it has more than 200 staff up to now. Li Zhanxiao, its owner and President, has devoted himself to the industry since 1980s, and has experienced in casing production and business management. Principal products are natural casing and heparin sodium raw material, mainly exported to Germany, France and other European and American countries. The annual output of the natural casing amounts to 8000 barrels and heparin sodium raw material 300 billion unit.