In 2001 the Shanghai Tongwei Biotechnology Co. Ltd was founded within Shanghai Academy of Agriculture Science. It has more than ten intermediate and senior scientific and technological specialists, two subcompanies, four offices, two bases of production and experimentation, and one research institute. The major business of the company is the research and deveopment of the technologies in agricultural chemistry, biochemistry and biology. The company is a national joint venture science and technology enterprise with performance of integrating science, industry and trade. Zhang Changshu is a senior engineer.