Dr. Guoqing Jing is a Professor at the Highway and Railway Engineering Department at Beijing Jiaotong University, China. He received his PhD in Civil Engineering from INSA de Rennes, France. Previously, he served as the Vice Director of the State Key Laboratory of Waterproof Materials in China and as a Guest Professor at UMP, Malaysia. Professor Jing’s current research focuses on ballasted track engineering, with an emphasis on recycled and composite materials. His work extensively utilizes numerical methods such as the discrete element method.