With many years of technological research, development and storage, Xi?an Yunzhi Biological Technology Co., Ltd. was founded in 2011 in Xi?an. Our company is a high-tech enterprise specialized in the comprehensive research, development, separation and purification of effective natural products from tobacco and its wastes. It has the world- advanced German made molecular distillation equipment, and various specialized production devices for supercritical extraction of the diverse active monomer ingredients.