Mr. Jiaqiu XU joined Prof. Leng's research group as a Ph.D. student in September 2022. He obtained his bachelor's degree and master's degree from Southwest Jiaotong University in 2017 and 2020, respectively. His research work focuses on the interaction behavior between asphalt and fillers, deriving alternative binders from biomass and waste materials, and the mechanical behavior of asphalt materials at low temperatures.