Inclusion criteria
| 1 | Patients voluntarily join the study and sign an informed consent form. |
| 2 | Aged ≥18 years, both men and women. |
| 3 | There is histologically confirmed, untreated gastric cancer or gastro-oesophageal junction cancer, and histological examination confirms that pT4NxM0/pT1-3N+M0 gastric cancer is mainly adenocarcinoma. |
| 4 | Eastern Cooperative Oncology Group score: 0~1. |
| 5 | Have not received antitumour therapy for gastric cancer before surgery, including chemotherapy, targeted, immune and local radiotherapy. |