Tianjin Dongri Animal By-Product Co., Ltd. is a Sino-Japanese joint venture manufacturer enterprise for more than 15 years. Mainly produce the best variety of Ammonium Sulphate. The annual production of our company is more than 100,000MT, and has increased year by year.As a key player from China, we only focus on improving quality of Ammonium Sulphate. We very dedicate our excellent products & service to you & willing to establish long-term friendly relations of cooperation.We look forward to your continued support and interest in our business activities.