To verify the reasonable grouping of the exploration set and validation set, statistical analysis was performed on the two parts using Wilcoxon Rank Sum Test for HER2-IHC, HER2-FISH, HER2/CEP17 ratio, HER2-SRM expression level, and TNM staging, and using χ2 test for FISH results, gender, Lauren classification, lymph node metastasis, differentiation degree, and tumor location. Here, ERBB2 is linked to neoplasm.