In the tail vein injection model, we counted metastatic tumours in the lungs of mice and found an increased number in mice administered YTHDF1‐overexpressing NOZ cells (YTHDF1, p < 0.001) and decreased number of tumours in those administered YTHDF1‐knockdown cells (shYTHDF1‐1, p < 0.05 and shYTHDF1‐2, p < 0.05) when compared with NC group (Figure 4E,F; Figure S1). This evidence concerns the gene YTHDF1 and neoplasm.