We used the TCGA data to verify our hypothesis that the expression of miRNA Let‐7a in gastric cancer tissue was downregulated, and the expression of HMGA1 and LINC00152 was upregulated, which showed that our previous hypothesis, i.e., HMGA1‐Let‐7a‐LINC00152 is a ceRNA, was correct. Here, HMGA1 is linked to gastric cancer.