Yuzhu Bai. He received his bachelor's degree B.S. Mechanical Engineering, From Inner Mongolia University of Technology in 2004. Worked in Inner Mongolia First Machinery Group Co., L.T.D. as a Technical engineer for ten years. He completed his master's degree from the School of Materials Engineering, Inner Mongolia University of Technology 2018. He joined the Department of Mechanical Engineering, Tsinghua University, Beijing, China, in 2018 as a Ph.D student. His research focuses on contact stiffness, surface topography and mechanics.