Founded in 1976, Shandong Longda Bio-Products Co., Ltd. is a large-scale manufacturing and trading enterprise of zymin. Now, Longda is the directors unit of Chinese Fermentation Industry Association Zymin Special Interest Committee. In 2001, Longda was awarded as the key manufacturing enterprise in zymin industry of China. Moreover, Longda is the hi-tech enterprise of Shandong province and is approved as the ISO9001 certificated company by Kosher, USA. With the design throughput of 50,000T/A, Longda's production level ranks first position and its production scale ranks second position in this industry of China. At present, Longda mainly offers 5 series (Glucose Amylase, Alpha-Amylase, High State α-Amylase, Cellulase, and Fungus α-Amylase) and over twenty kinds of products.