Prof. Dr. Chao Cai obtained his Ph.D. degree in the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Now, he is a professor at the Institute of Urban Environment, Chinese Academy of Sciences and principal investigator in the research group on remediation of contaminated soil and groundwater. His current research interests relate to environmental benefits of biochar as a soil amendment, molecular mechanism of biodegradation of pollutants, risk assessment and eco-environmental effects of pollutants in the brown field, green remediation technologies for contaminated soil and groundwater. Within the past five years, he has hosted more than 40 projects, published 50 papers and was granted 15 patents, ten of which were transformed and applied in the cooperative company. He has completed several demonstration projects for the remediation of contaminated soil and groundwater in Guangxi, Fujian, Hunan, and Guangdong provinces.