Qingdao Kehai Biotechnology Co., Ltd. is a wholly-owned subsidiary of Qingdao Langyatai Group Co., Ltd., established in 2003. It is a high-tech enterprise in Qingdao, a key biotechnology enterprise in Qingdao, and a specialized, refined, and innovative enterprise in Qingdao. The main products of the company include: itaconic acid and its derivative series products, Chlorella, chitosan oligosaccharides, etc. With microbial fermentation technology as the core and adhering to the concept of "strict management, leading technology, quality first, and customer first", the company has become a winner of the "China Industrial Award" and has been selected as one of the first batch of "China Manufacturing Single Champion Demonstration Enterprises" and "National High tech Enterprises". 

The company has successively presided over the development of national standards for "Itaconic acid" and "Classification of Organic Acids by Biological Fermentation Method". The construction and optimization technology of organic acid biosynthesis pathway has been listed as a national 863 plan project. Received honorary titles such as "National Science and Technology Progress Award", "National Technology Innovation Demonstration Enterprise", "National New Product", "National Strategic Emerging Industry Key Product", and "National Recycling Transformation Demonstration Pilot Enterprise". It is a unit responsible for the implementation of the national key research and development plan for synthetic biology and the national high-tech industrialization of marine biology.

Kehai Biological has the right to self operate import and export, actively exploring the global market, and has passed multiple certifications both domestically and internationally, including ISO22000 quality certification, HACCP system certification, KOSHER, HALAL, FDA, etc. The company has established long-term and stable cooperative relationships with Fortune Global 500 companies such as BASF and Dow Chemical, with business covering Europe, America, South Africa, South Korea, Australia, Japan, and other parts of the world.

Itaconic acid is an important intermediate in the production of new materials. It is an important industrial raw material for the production of acrylic fibers, synthetic resins, synthetic fibers, herbicides, rubber, non-toxic food packaging materials, plastics, latex, pharmaceuticals, surfactants, adhesives, and other important additives for military aircraft and civil aviation new materials. It is a national level new product. 

The company's product, Chlorella pyrenoidosa powder, uses unique microbial fermentation technology to effectively control heavy metal content during the production process. The protein content is above 60%, and the product meets the requirements of new food raw materials. In 2020, Chlorella pyrenoidosa powder was awarded the honorary title of Shandong Health Good Product.

Chitooligosaccharide, also known as chitosan oligosaccharide or oligochitosan oligosaccharide, is an oligosaccharide product with a degree of polymerization between 2 and 10 obtained by special enzyme technology. It has good water solubility and is a positively charged cationic alkaline amino oligosaccharide in nature. The company's "Construction and Clean Production Project of a New Process for Chitosan Oligosaccharide Preparation Based on Enzymatic Method" has passed technological appraisal and is the drafting unit of industry standards for chitosan oligosaccharide production.