Dr. Liu earned his PhD in environmental engineering from Yamaguchi University, Japan in 2003. He then worked at Kyushu Environmental Evaluation Association, Osaka Institute of Technology, Tokyo University of Agriculture and Technology, and Yokohama National University as a postdoctoral and research fellow. Dr. Liu has more than 10 years of experience in environmental science and technology, particularly in the areas of air quality monitoring, water and soil research, and their associated instrument development. He has published over 40 papers and over 20 conference proceedings.