Shandong Tonghui Biotechnology Co., Ltd. founded in 2011 is located in Luyang Industrial Zone, Wudi County, Binzhou City, Shandong Pro. China, which covers an area of about 30000 m2 and a total construction area of about 20000 m2. It is the private high-tech enterprise set R & D, production and sale. The enterprise is the leading manufacturer specializing in the production of vitamin D3 in China, which have the complete industrial chain of Cholesterol, 7-Dehydrocholesterol, vitamin D3 oil and vitamin D3 power. We also have first-degree manufacturing equipment, topping technology and technical personnel. Now widely used in medicine, food and feed industry. Now the production capacity reaches to 1000 tons per year.