Occupational Risks and Guarantee Path of the Delivery Man in Digital Economy - Daizhi, Jin; Han, Wang; Xhafa, Fatos, Series Editor; Hassanien, Aboul Ella, editor; Xu, Yaoqun, editor; Zhao, Zhijie, editor; Mohammed, Sabah, editor; Fan, Zhipeng, editor (Business Intelligence and Information Technology : Proceedings of the International Conference on Business Intelligence and Information Technology BIIT 2021, 2022)