To explore the mechanism of circ-ZEB1.33-miR-200a-3p-CDK6, we determined the expression of circ-ZEB-133 in various HCC cell lines (97H, Huh7, HepG2, SNU423, SNU475, and L02), we found that Huh7 and 97H were ranked first 2 high-expression cell lines of all seven (Fig. 3a). This evidence concerns the gene CDK6 and hepatocellular carcinoma.