Comparison of Vagus Nerve-preserving RADG and Conventional RADG for AGC

Inclusion Criteria: 1. Male or female, aged less than 70 years and more than 18 years; 2. Underwent gastroscopy and biopsy - preoperative definite for advanced gastric cancer invasion depth is T2, T3; 3. The lesion is in the middle and lower stomach; 4. Magix routine upper gastrointestinal barium meal, endoscopic ultrasonography, abdominal CT and chest X ray examination, clearly no nerve invasion and adjacent organ invasion and distant metastasis; 5. The preoperative examination of lung, liver, heart, renal insufficiency, surgical contraindication; 6. The preoperative abdominal CT or abdominal ultrasound without biliary disease and gallbladder stones; 7. No history of gastrointestinal dysfunction and other malignant tumor history; 8. The patients voluntarily participate in the study and signed informed consent. Exclusion Criteria: 1. Older than 70 years old or because of chemotherapy surgery and complications after intolerance; 2. The vagus nerve invasion or invasion of adjacent organs or confirmed the presence of distant metastasis; 3. Have a history of abdominal surgery or chemotherapy before surgery; 4. The recent cardiovascular hemorrhagic or ischemic disease; 5. The amount of abnormal glucose tolerance or diabetes; 6. Not suitable for robotic surgery, such as body short that mechanical arm can not have enough activity range; 7. The history of biliary calculi or gastrointestinal dysfunction; 8. The other is not suitable for receiving robot surgery; 9. Participated in other clinical studies in the last month; 10. Other researchers not suitable for participation in the study of (HIV infection and intravenous drug addict), or other effects of this clinical study results analysis of the situation.