From April 14th to 17th, 2024, the 50th Annual Meeting of the European Society for Blood and Marrow Transplantation (EBMT) was held in Glasgow, United Kingdom. The conference focused on the latest advances in stem cell transplantation and cell therapy, driving towards better clinical outcomes for patients with hematologic diseases and blood tumors. At this year's conference, a study by Professor Hui Wang's team from Beijing Lu Daopei Hematology Research Institute was included for poster presentation, revealing the significance of cytokines and T cell subsets in the process of CD7 CAR-T therapy. This journal invited Professor Hui Wang to share the research findings and their clinical significance with colleagues.