Vitamin D3 is the Chinese Academy of Sciences, "Ninth Five-Year Plan the focus of development projects", "Chinese Academy of Sciences Knowledge Innovation Project", but also of Chinese Medicine Industry Corporation to determine the focus of research projects. Vitamin D3 in human and animal growth, development, reproduction, life-sustaining and maintaining the health of a vitamin indispensable, and its main role is to regulate calcium and phosphate metabolism, and promote intestinal calcium and phosphorus absorption and bone calcification. With the rapid development of science and technology and social progress, constantly improve people's living standard, the product is more widely used in food, beverages and feed industry. Institute of Photographic Chemistry, Chinese Academy of Sciences from the 20th century, the early 80s began working on cholesterol synthesis of vitamin D3 from the study, the early 90's developed a synthesis of vitamin D3 from the cholesterol of the new process line. Line with this technology compared with foreign technology: small steps, high yield and low cost advantages of the 3. However, if the Chinese Academy of Sciences of the long photoreceptor more than 10 years to realize industrialization of scientific and technological achievements of the large-scale production needs to be put in a lot of funds for pilot development. our president in June 1996 without any hesitation and was signed by the Chinese Academy of Sciences photosensitive a joint venture agreement for the joint development project of vitamin D3. Scientific and technical personnel of both sides to work together in mid-April 1998, vitamin D3 precursors 7 - dehydro cholesterol test successfully. Vitamin D3 in the September 1999 test of the success in Beijing. Garden Group in May 2000 invested 20 million yuan, one-time buy-out the world's most advanced production technology of vitamin D3, so that the garden group have independent intellectual property rights.