Professor Xin Ruan is the Vice Dean at the College of Civil Engineering, Tongji University. He completed his PhD studies in Bridge and Tunnel Engineering at Tongji University and has been awarded the 2018 International Association for Bridge Maintenance and Safety (IABMAS) Junior Award. He recently led the National Natural Science Foundation of China (General Program) project on the micro–macro translation theory for numerical simulation of the durability of concrete structures in bridges. He has published over 200 papers in various journals and serves as a member of the Youth Expert Committee of the China Highway and Transportation Society, as well as for related research projects. His teaching disciplines include Bridge Engineering and Road and Railway Engineering, and his research interests include bridge design theory, bridge engineering risk assessment, bridge loads, and bridge structural durability. His research interests include transportation safety policies and regulations, safety risk assessment and control, safety protection facilities and equipment, and safety emergency support technologies for major infrastructure.