Founded in 2000, Hangzhou Bioking Biochemical Engineering Co., Ltd., is located in Tangqi Ancient Town, Hangzhou, with a registered capital of 75 million yuan. It is a high-tech enterprise specializing in the production of tartaric acid. Bioking has been awarded the titles of "National Torch High-tech Enterprise", "Provincial R&D Center", "Hangzhou Innovative Pilot Enterprise", "Yuhang District Industry Leading Benchmarking Enterprise". It was listed as "Hangzhou Listing Guidance Enterprise" in 2013, as "Zhejiang Manufacturing Brand Fostering Enterprise", "Hangzhou Strategic Emerging Industries Fostering Enterprise" in 2016, and Hangzhou. Municipal "Machine Replacement" demonstration application enterprises, many times won the "Yuhang Top Ten Foreign Trade Export Enterprises". He has been commended by the municipal and district governments for many times. There are three chemical isomers of tartaric acid, namely L (+) - tartaric acid (dextral), D (-) - tartaric acid (levo) and ESO - tartaric acid (racemic). The tartaric acid obtained by chemical synthesis is usually DL-tartaric acid (racemic) with 50% dextral and 50% levo-tartaric acid respectively. L(+) -tartaric acid is a natural configuration, also known as d-tartaric acid, which widely exists in many plants, such as grapes and tamarind fruits. D (-) - tartaric acid is also known as L - tartaric acid, which is found in the fruits and leaves of the goat's shoe nail. L(+)-tartaric acid and D(-)-tartaric acid can be obtained by conversion of Epoxysuccinic acid with different enzymes, or by chemical resolution of DL-tartaric acid.