Generally speaking, bursectomy is incomplete without total gastrectomy. The concept of bursectomy mentioned above is always almost confined to removal of the local anterior membrane of the transverse mesocolon and pancreatic capsule and to open radical gastrectomy. With the generalization and development of laparoscopic technology, laparoscopic surgery for advanced gastric cancer as clinical study has extensively performed in Asia.The investigators take the lead in carrying out laparoscopic bursectomy and D2 radical gastrectomy by. Herein, the investigators conduct a single-centre randomized controlled trial to explore the safety and feasibility of totally laparoscopic D2 radical total gastrectomy using a left outside bursa omentalis approach for achieving complete bursectomy.