After successfully constructing a cell line with differential expression of ALDH1A1, it was found that high expression of ALDH1A1 can significantly promote tumor cell colony formation, inhibit tumor cell apoptosis, promote tumor cell migration and invasion, and inhibit ALDH1A1 expression to exert an inhibitory effect on tumors (Figures 3D–H). Here, ALDH1A1 is linked to neoplasm.