At 72 hrs after infection by LV‐CXCR7‐shRNA, the HCCLM3 cells were observed under an inverted fluorescence microscope for green fluorescent protein (GFP) expression, which was identified in the majority of the cells (Fig. 1), indicating that the cells grew well and LV‐CXCR7‐shRNA efficiently infected the HCCLM3 cells. The gene discussed is ACKR3; the disease is infection.