 5. Follow-up: The follow-up of this study divide into two parts, the postoperative quality of life and tumor characteristics outcomes. The information of the postoperative quality of life is collected by the European Organization for Research and Treatment of Cancer EORCT QLQ-C30 and STO-22 questionnaires. At the postoperative 12 moths, the upper gastrointestinal scope is needed to examine the reflux esophagitis and the remnant gastritis according to Los Angeles Classification of esophagitis. The tumor related outcomes included long-term postoperative complications, recurrence type, relapse free survival months and the overall survival months. 