Pure Phosphatidylserine Powder suppliers About Guanjie Technolgy Shaanxi Guanjie Technology Co.,Ltd was invested and established in 2009 by Xi'an Guanyu Bio-technology Co.,Ltd which was established in 2004. Guanjie is a Hi-tech private enterprise specializing in the research, development, production and sales of natural plant extracts and Chinese traditional medicines to serve customers in the the nutraceutical food additived, pharmaceutical and cosmetics industries. Guanjie Biotech has continuously strived to innovate and improve its control standards for 17 years.