Rescue experiments demonstrated that the inhibitory effect of stable CD2BP2‐DT knockdown on CDK1 expression was reversed by YBX1 overexpression in breast cancer, while the promoting effect of CD2BP2‐DT overexpression on CDK1 was inhibited by YBX1 knockdown (Figure 4F; Figure S4H, Supporting Information). The gene discussed is CD2BP2; the disease is breast cancer.