Inclusion Criteria:  1.18~75 years old 2.The tumor center located at the esophagogastric junction(EGJ) line from 1cm above to 2cm below(SiewertⅡ) . 3.Histological diagnosis of adenocarcinoma 4. American Society of Anesthesiologists(ASA) physical status class is less than or equal to 3 5.Informed consent of patients  Exclusion Criteria:  1.Patients with distant metastasis (M1) or invasion of surrounding organs 2.History of esophagectomy and gastrectomy (including endoscopic mucosal resection/endoscopic submucosal dissection for gastric cancer and esophageal cancer) 3.History of other malignant tumors within 5 years 4.The researcher believes that the patient is not suitable to participate in the clinical trial 5.Patients who persist in withdrawing from clinical trials