Dr. Hui-juan Xu is currently an associate professor in the Department of Soil Science, College of Resources and Environment, South China Agricultural University. She received a bachelor's degree in environmental science from Qingdao University in 2006, a master's degree in soil science from the Shenyang Institute of Applied Ecology, Chinese Academy of Sciences in 2009, and a doctorate in environmental science from the Institute of Urban Environment, Chinese Academy of Sciences in 2015. He has been working at South China Agricultural University since July 2015. Dr. Hui-juan Xu's professional research areas include the biodegradation of soil organic pollutants and the nitrogen cycle process of heavy metal-contaminated soil.