The fourth “Tongji Case Day” was successfully held on April 15, 2023 at Tongji Building A. The case day was hosted by the Case Center of Tongji-SEM, and co-hosted by the MBA/EMBA Center and Academic Programs Center. Six entrepreneurs from Shanghai Zhenhua Port Machinery Company, Huafei Economic Research Institute, KNAUF, JD Technology, Hangzhou Metaforce Intelligence and technology Companyand Baosteel Engineering & Technology Group were invited to share real-life business practices. Additionally, eleven professors/entrepreneurs were invited to give comments to the cases. Over 500 people, including teachers, students, and industry professionals participated in the “Tongji Case Day” this year, online and offline.