Congren Yang is an Associate Professor at the School of Minerals Processing and Bioengineering at Central South University. He received his BS, MSc, and PhD in Mineral Processing Engineering from Central South University in 2008, 2011, and 2015, respectively. From 2015 to 2018, he conducted postdoctoral research at the School of Environment at Tsinghua University. His research interest focuses on theory and technology of clean and efficient utilization of complex mineral resources, including evolution of mineral surface layers and dissolved constituents in pulp formed during flotation and leaching of sulfide, flotation separation of calcium-containing minerals; and recycling valuable metals from electronic waste and its implications for sustainability, such as using physical and chemical methods to recover valuable metals from waste printed circuit boards, material flow analysis of tin. He has published over 60 peer-reviewed journal articles.