Dr. Chenyang Xu is an Associate Professor and Master Supervisor at the College of Resources and Environment, Northwest Agriculture and Forestry University. Her research interests are soil colloids and interface chemistry, and she has long been engaged in the study of the interaction process between charged nanoparticles and colloidal particles. Her current research interests are the relationship between soil nanoparticles and aggregate formation, the environmental behavior of biochar colloids and other new pollutant colloids, and their impact on soil properties and processes.