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Jiawen is a PhD student at the College of Transport Engineering at Tongji University. Jiawen’s research interests include the impact of human factors on helmet use and e-bike traffic crashes - an important issue in traffic safety analysis due to the increase in e-bike crashes. Jiawen and her colleagues have established an ordered logistic mediator model to obtain in-depth results and find out the influencing factors of helmet use and the number of delivery riders e-bike crashes. As well, Jiawen has conducted a city wide random online survey to explore e-bike use by 6,941 delivery riders in Shanghai.