Qiyong Xu received his B.Sc. in Environmental Engineering from Nanchang Hangkong University in 1996, received his M.Sc. in Environmental Science from Sichuan University in 2000, and received his Ph.D. in Engineering from the University of Florida, USA, in 2005. As a postdoctoral fellow at the University of Florida, he mainly engaged in research on solid waste resource utilization. From December 2006 to June 2010, he was a senior engineer at IWCS, USA, and engaged in environmental engineering design and consulting. He qualifies as a registered environmental engineer in the United States. He is currently an associate professor at Peking University. His main research areas are solid waste pollution control and resource utilization and management. In addition, he is the director of Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials. He has presided over more than 20 scientific research projects and published more than 160 academic papers in peer-reviewed journals, including more than 80 SCI papers as the first/corresponding author. He has won the Peking University Outstanding Moral Education Award, Teaching Excellence Award, and Peking University Shenzhen Graduate School Outstanding Teacher Award.