3. Surgical procedures: The surgical treatments is adopted the total gastrectomy according to the Japanese Gastric Cancer treatments guidelines, 2010, Version 3. Patients in the Group A with 3cm length proximal resection margin and patients in the Group B with 5cm length proximal resection margin. Intraoperative frozen section will routinely performed to secure the tumor free resection margin. If the positive resection margin is found by the intraoperative frozen section, supplementary resection was depend on the characteristics of each patients. Whether these patients with supplementary resection, the length of supplementary resection and the times of the supplementary resection are all needed to record. The two study will take the similar surgical procedures except for the length of the resection margin.