Compared with HepG2.2.15 tumour‐bearing mice, HepG2.2.15‐BMP9‐MB tumour‐bearing mice, which showed increased tumour vessel perfusion (Figure 7B, Supporting Information Figure S8H,I), exhibited decreased tumour growth after treatment with NK cells and the PD‐L1 inhibitor (Figure 7C‐E). The gene discussed is GDF2; the disease is neoplasm.