Hainan Yangshengtang Pharmaceutical Co., Ltd. was established in 1993, and its production bases are located in Haikou City, Hainan Province and Hangzhou City, Zhejiang Province. It is one of the top 50 industrial enterprises in Hainan Province, and has been rated as "a big taxpayer in Hainan Province" and "a high-tech enterprise in Hainan Province". The company is committed to the research and promotion of modern nutritional supplements, and a series of health products such as Guiling Pill, Flower, Yangshengtang Natural Vitamin E, Adult Vitamin, Happy Growth and Natural Vitamin C have become the industry leaders.