Shijiazhuang Green Bridge Trading Co., Ltd., a joint-stock enterprise 500 employees, specializes in the production of EDTA series of products, with annual production capacity of 40, 000 tons. The main products are EDTA, EDTA-2Na, EDTA-4Na, EDTA-FeNa, EDTA-CuNa2, EDTA-ZnNa2, EDTA-CaNa2, EDTA-MgNa2, EDTA-MnNa2, barbituric acid, 4.6-dihydroxy pyrimidine and ethoxy methylene diethyl malonate. The company has passed the certification of ISO9002 Quality Management System, with autonomy in import-export management. Its products are exported to dozens of countries and regions in North and South America, Europe, Asia, Australia and South Africa, enjoying high credibility and popularity in the international community. In virtue of the business philosophy of "Constantly Improving the Product Quality and Service Standards, and Realizing Customer Satisfaction", the company has integrated R & D and production into a whole, established good cooperative relationship with clients at home and abroad, and has been rated as one of the Top Ten Private Enterprises of Shijiazhuang City in 2005.