1.Regular review is needed after gastric cancer treatment Regular review is needed after gastric cancer surgery to present or exclude postoperative complications and detect tumor recurrence and metastatic lesions at an early stage. Various physiological functional changes of gastrointestinal system may occur after gastric cancer surgery, such as bile reflux gastritis, digestive and absorption disorders, malnutrition, anemia, hypoglycemia and other various complications, and timely diagnosis and treatment of these complications can reduce patients’ pain. 2.Frequency of review Every three months within 2 years after surgery, every six months from the 3rd to 5th year, and every year after the 5th year. The purpose of early postoperative X-ray examination of gastric cancer is to understand whether the anastomosis is open and whether there are postoperative complications such as anastomotic fistula, and dilute barium contrast should be used at this time. The postoperative review includes physical examination: whether there is anemia, whether there are enlarged lymph nodes on the clavicle, whether there are lumps in the abdomen, whether the liver is enlarged, whether there are nodes in the umbilicus, and whether the lumps can be palpated in the anterior rectal recess. Ancillary examinations include blood routine, liver function, tumor markers, chest X-ray, abdominal ultrasound, and CT, MRI or gastroscopy if necessary, to clarify whether there is recurrence or metastasis. Gastroscopy should be done once a year. For those who develop macrocytic anemia after total gastrectomy, vitamin B12 and folic acid should be supplemented.