As the largest High-tech company for drug production in the Ningxia Hui Autonomous Region, Duoweitairui Pharmaceutical is located in Yongning Wangyuan Development Zone and occupies  the land of 68000 square meters, hires 630 workers in factory and 120 officials in Beijing marketing center. Duoweitairui was built according GMP requirement and adopted the latest technology and production line. Currently, under the support of tens of experts in the field of Antibiotics world wide, Duoweitairui Pharmaceutical has been the largest production base for Antibiotics in China. The main products tylosin tartrate and tylosin phosphate pure & premix had been widely accepted by the clients worldwide with the excellent reputation on super quality and thoughtful service. To guarantee our clients on a reliable quality, we set up our own quality control center. The computer automatic control system had been adopted in the production line of antibiotics for ensuring whole production procedure is under control and keeping the products? quality in high standards. contact: Ningxia Duoweitairui Pharmaceutical Co.,Ltd. Attn: Mrs. Christina Zhao Tel: +86-10-82684966-ext 813 Fax: +86-10-82684966-ext 815 Email: