Ko Yo Chemical (Group) Limited, an investment holding company, engages in the research and development, manufacture, marketing, and distribution of chemical products and chemical fertilizers in China. Its products include bulk blended fertilizer, urea, soda ash, and ammonia chloride. The company also provides agrotechnical services, including seeds selection, soil testing, fertilizing, field management, and prevention and control of diseases and pests to farmers under the Jiu Yuan Ce Fang brand. In addition, it is involved in the exploration and exploitation of a phosphorous mine; development of phosphoric acid and chemical production technology; and the manufacture and sale of engineering plastics. The company was incorporated in 2002 and is headquartered in Causeway Bay, Hong Kong.