CAR-T therapies represent a new successful strategy for the treatment of hematological malignancies; however, recent studies have revealed some limitations, including the occurrence of graft-versus-host disease (GVHD), neurotoxicity, and cytokine release syndromes (CRS). This has prompted researchers to look for alternative, safer cells, such as natural killer (NK) cells ¹. NK cells are lymphocytes that kill tumor cells and virus-infected cells non-specifically, without prior sensitization. CAR-NK therapy involves the modification of NK cells with mature chimeric antigen receptor (CAR) technology to exploit their unique target cell recognition mechanism and broad tumor-killing ability. Figure 1 illustrates the CAR-NK therapeutic strategy ¹. Compared with CAR-T therapy, CAR-NK therapy has numerous advantages, such as lower GVHD and significantly reduced CRS toxicity and immune effector cell-associated neurotoxicity syndrome toxicity, which enhance overall safety ^{2, 3}. In addition, NK cells have multiple tumor recognition sites, thus potentially reducing antigenic escape failure ⁴.