The Differential Fiber Project of Zhejiang Tiansheng Chemical Fiber Co., Ltd. achieved the full load of 400,000 tons on Jul.28. According to officials, since project effectiveness in Oct. 2010, preparation has been undertaken. This project has annual output of 400,000 tons of differential fiber. By now, Zhejiang Tiansheng Chemical Fiber Co., Ltd. has annual output of 800,000 tons of chemical fiber and become the largest FDY producer in China.