Robotic Versus Laparoscopic Radical Surgery for Locally Advanced Gastric Cancer

Inclusion Criteria: 1. Age \> 18 years and \< 75 years. 2. Primary gastric lesion histologically confirmed as gastric adenocarcinoma (including papillary adenocarcinoma, tubular adenocarcinoma, mucinous adenocarcinoma, signet ring cell carcinoma, poorly differentiated adenocarcinoma, etc.) via endoscopic biopsy. 3. Preoperative clinical staging as locally advanced gastric cancer (cT2-4a, N0-3, M0) according to the 8th edition of the AJCC TNM staging system. 4. No distant metastasis on preoperative examination, and no direct invasion of the pancreas, spleen, or other adjacent organs. 5. Preoperative ECOG performance status score of 0 or 1. 6. Preoperative ASA (American Society of Anesthesiologists) physical status score of I-III. 7. Consent to participate in the study and signing of the informed consent form. Exclusion Criteria: 1. Previous history of gastric malignancy surgery, including submucosal resection and/or endoscopic mucosal resection. 2. History of upper abdominal surgery (excluding laparoscopic cholecystectomy). 3. Preoperative imaging shows regional lymph nodes with confluent enlargement (maximum diameter ≥3cm). 4. Patient underwent emergency surgery due to gastric tumor bleeding or perforation. 5. History of other malignancies, or presence of other malignant tumors detected during preoperative examination. 6. Patient has a history of malignant tumor, or other malignant tumors were found during preoperative examination 7. ASA (American Society of Anesthesiologists) score \>3. 8. Severe psychiatric disorders. 9. History of unstable angina or myocardial infarction within the past 6 months. 10. History of cerebral infarction or cerebral hemorrhage within the past 6 months. 11. Severe pulmonary disease with FEV1 \< 50%. 12. Systemic corticosteroid therapy within 1 month prior to the study. 13. Need for concurrent surgery for other diseases. 14. Pregnant or breastfeeding women.