This study is looking at a type of surgery called total laparoscopic proximal gastrectomy (TLPG) for patients with early upper gastric cancer. The surgery focuses on whether to keep a part of the vagus nerve, which helps control the stomach. The main goal is to see how well the stomach empties food six months after surgery. Other things the study checks include the chance of developing reflux esophagitis (a condition where stomach acid irritates the esophagus), overall quality of life, and survival without disease for three years.

Patients in the study will be randomly placed into two groups: one where both the hepatic and celiac branches of the vagus nerve are kept, and another where only the hepatic branch is kept. The study will help doctors understand if keeping both branches makes a difference in recovery.

• The study will last for at least three years.
• Participants will undergo surgery and follow-ups.
• Outcomes may affect future surgical techniques.