Hi, I am Xiaotian (Jim) Xu, a Ph.D. Student at Department of Atmospheric Science, University of Illinois at Urbana-Champaign (UIUC), under supervision of Prof. Nicole Riemer. Before that, I worked as a full-time research assistant in Prof. Yanxu Zhang’s group in School of Atmospheric Science at Nanjing university (NJU) from 2019 to 2021. I received my M.S. degree in Environmental Science and Management at the Hong Kong University of Science and Technology (HKUST) in 2019, for thesis conducted in the Atmospheric Chemistry Group of Prof. Jianzhen Yu. and my B.Eng. degree in Environmental Engineering at Shanxi University (SXU) in 2018.