Recent study has shown that GAS5 could inhibit the metastasis of bladder cancer by regulating the expression of chemokine (C‐C motif) ligand 1.24 Study of Bian has also shown that GAS5 promotes apoptosis by inhibiting EZH2 transcription in bladder cancer.12 Study has shown that hepatocellular carcinoma patients who had higher GAS5 level or lower miR‐21 level had longer survival times. The gene discussed is GAS5; the disease is hepatocellular carcinoma.