Yongyong He received his B.S. in Mechanical Engineering from the Nanjing Aeronautical Institute in 1991, his M.S. in Mechanical Engineering from the Southeast University in 1994, and his Ph.D. in Precision Instruments from the Southeast University, Nanjing, China in 1997. Currently, he is a Professor at the State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University. His research areas include the following: surface interface modification, frictional wear mechanisms, and lubrication mechanisms. He was awarded: 1. "Chip manufacturing polishing equipment and complete sets of processes", Yearly Machinery Industry Federation Technical Invention Award Grand Prize, 2019 (5th finisher); 2. "Key technology of high-precision bearing ultra-precision machining and industrialization application", First Prize of Science and Technology Progress of Zhejiang Province, 2016 (6th finisher); 3. "Some theories and methods of health maintenance of mechanical equipment", a first-class prize awarded by the Natural Science of Higher Education Institutions, Ministry of Education, 2011 (5th completer); 4. "Research and Application of Condition Monitoring and Fault Diagnosis Technology for Hydropower Units", second prize of Science and Technology Progress of Higher Education Institutions, Ministry of Education, 2006 (2nd completer).