Yuanyuan Duan graduated from Tsinghua University in 1994 with a bachelor's degree in engineering and a bachelor's degree in economics. He also received his Ph.D. in Engineering Thermophysics from Tsinghua University in 1998. His doctoral research work was to measure the thermophysical properties of the new working fluids, difluoromethane and trifluoroiodomethane, including vapor pressure, PVT properties, speed of sound, surface tension, viscosity and thermal conductivity, and established the equations of state and theoretical models of thermophysical properties. He also won the National Excellent Doctoral Dissertation in 2000. He has been a Lecturer at Tsinghua University since 1998, and was promoted to Associate Professor in 2000 and Full Professor in 2003. His research interests include thermodynamics and thermophysical properties of fluids, energy system analysis, heat and mass transfer, and wetting dynamics, and he has published more than 400 peer-reviewed papers. He is a recipient of the National Science Fund for Distinguished Young Scholars, and has successively won the first prize of the National Science and Technology Progress Award, the second prize of the National Technology Invention Award, the first prize of the Natural Science Award of Chinese Universities, the second prize of the Ministry of Education Science and Technology Progress Award, and the second prize of Guangdong Province Science and Technology Progress Award and other academic awards, and was selected as "Elsevier China Highly Cited Scholar". He also serves as a director of the Chinese Society of Engineering Thermophysics, a director of the Chinese Higher Education Society, and a director of the Chinese Society For Measurement. In 2019, he won the New Century Teaching Achievement Award of Tsinghua University.