Xihui ZHANG got his Ph.D. in Department of Environmental Engineering, Tsinghua University and he is now Professor of Tsinghua Shenzhen International Graduate School. He is the member of the Assessment Group of Environmental Science and Engineering Discipline under the State Council and Vice President of Water Environment Branch of China Society of Environmental Sciences. He has acquired Huaxia Science and Technology Award (secondary prize) from Ministry of Construction in 2008. His research interests focus on water environment restoration, nano-reactor theory and technology and membrane technology.