Early and middle stage gastric cancer can still be cured.1. Especially for stage 1a gastric cancer, it can generally be cured by surgical resection, and there is no need for adjuvant chemotherapy after surgery, and its 5-year survival rate can reach more than 90%.2. For stage 1b, if the tumor is hypofractionated, or if it is an indolent cell carcinoma or has a cholangiocarcinoma embolus, and if the age is less than 50, adjuvant chemotherapy is needed after surgery, and it can be cured by comprehensive treatment.3. For stage 2 and 3 patients, adjuvant chemotherapy is required after surgery. For this group of patients, although after comprehensive treatment, the 5-year survival rate is definitely lower than that of stage 1, and recurrence and metastasis may occur after surgery and chemotherapy.