1.18 ≤ age ≤ 70, Male or Female; 2.Minimum life expectancy of 6 months; 3.Patients with localized, histologically confirmed gastric or gastroesophageal adenocarcinoma; 4.Patients must have a performance status of < 2 Eastern Cooperative Oncology Group (ECOG); 5.No prior major surgery of the stomach or radiation therapy to the stomach or immunotherapy or chemotherapy; 6.CT or MRI, endorectal ultrasonography (EUS), laparoscopic exploration are required to stage; 7.Without other benign diseases such as lung, kidney, liver infections; 8.Without participating other clinical trials; 9.Patient must sign an informed consent prior to study entry; 10.Patients must have adequate bone marrow function (defined as peripheral absolute granulocyte count of >1,500/µL, and platelet count of > 100,000/µL), adequate liver function (bilirubin <= 1.5 mg/dl), and adequate renal function (creatinine <= 1.5 mg/dl). 11)Patients without cardiac disease , severe uncontrolled diabetes, hypertension, cerebrovascular disease, or infection.