Clinical Trial of Reconstruction After Proximal Gastrectomy

1) To explore a simple, safe, post-proximal gastrectomy reconstruction method with good absorption and digestive function in order to improve patients\' postoperative quality of life; 2) To fill the gap in the comparison of clinical efficacy between left-open single-flap technique and double-flap technique in this specialized field in China; 3) To utilize the experience and foundation of gastrointestinal surgery in the treatment of gastric cancer and integrate the advantageous resources in China; 4) To establish a large-sample, multicenter randomized clinical study in order to promote the establishment and improvement of relevant norms of gastrointestinal reconstruction