Jianguo LIU is professor, School of Environment, Tsinghua University, Deputy Director of the Key Laboratory of Solid Waste Treatment and Environmental Safety of the Ministry of Education, editorial board member of Environmental Health Engineering, editorial board member of Urban Management and Technology, Biomass and Waste Academic Advisor of Valorisation, Academic Advisor of Detritus, Expert of China Urban Environmental Hygiene Association, Member of Technical Committee of Standardization of Urban Environment and Sanitation of Ministry of Housing and Urban-Rural Development, Director of China Environmental Protection Industry Association, Expert of Industrial Innovation and Development Collaboration of Waste classification and Renewable Resource Utilization, International Solid Waste Working Group (IWWG) ) Members. His research fields includ sustainable landfill and anaerobic digestion technology of solid waste, building materials utilization technology of solid waste, composite contaminated site remediation technology, solid waste treatment and utilization technology evaluation.