Xianlai ZENG is vice chairman of Tsinghua University, associate researcher of School of Environment, Tsinghua University, doctoral supervisor. He mainly engaged in the research of material metabolism and recycling, as the vice chairman and Secretary general of circular Economy Branch of Chinese Society of Environmental Sciences, and deputy chairman of regional professional committee of China Ecological Economy Society; He was selected as a Fulbright Scholar in the United States, a top young technical talent in national ecological and environmental protection, and a young Yangtze River Scholar of the Ministry of Education.