Leshan Sanjiang Bio-Tech Co.,Ltd. was co-founded by Expert from Chinese Academy of Forestry and Chung-Yun Hse,a famous research scientist in wood utilization. Sanjiang Mainly use China's special forestry resource Gallnuts as raw materials，through the biological enzyme process to produce a variety of Gallic acid series products: Gallic acid, Methyl gallate, Propyl gallate. Our star product is electron-grade Gallic acid,which is widely used in semi-conductor field.