Shanghai Qunsen Industry and Trade Co., Ltd?belongs to China Nanping Degussa Co., Ltd - Wellink Chemical Group, jointed by Germany-China, the largest manufacturer of chemical group for silicon dioxide (white carbon black); activated carbon; barium sulfate etc in China. Degussa - Wellink Chemical Group, joint by Fujian Nanping Wellink Chemical Industrial co., Ltd and Degussa Co., Ltd, the largest manufacturer of chemical group, mainly deal in precipitated silicon dioxide superfine powder, fumed silicon dioxide superfine powder attaching activated carbon, barium sulfate, and Titanium Dioxide powder.