Ningbo Jinzhan Biotechnology Co.,Ltd.(Formerly named Ninghai Organic Chemical Factory) was founded in 1989, located in Xidian industrial zone,Ningbo city, Zhejiang Province,China. It is a strengthful engineering Enterprise in Ninghai county, also ranked as an AAA credit enterprise by Ningbo Competence and Credit Appraisal Committee. It is a major manufacturer and worldwide supplier of high quality tartaric acid and its derivatives. The company initiated L(+)-tartaric acid in China, the annual output of L(+)-tartaric acid is 5,000 tons and 20,000 tons of others .