After graduation from Tsinghua University with his bachelor degree in 1988s, Mr. Runxing Xie acted as a teacher for 2 years in the same college, and then engaged in research work in extraction field under Mr. Weiyang Fei. (An academician of the chinese academy of sciences) and got master degree in 1993s.Then he joined in Tsinghua Technical Service Co., Ltd, and participated in establishing Zehua Company in 1995s. He has been working in the mass transfer field and cooperating with the first-class chemical experts in the world all along, thus accumulated extensive experience in distillation field and known as a renowned mass transfer technology expert.