The survival time of gastric cancer after surgery mainly depends on the TNM stage of gastric cancer after surgery, that is, it depends on the depth of gastric cancer infiltrating the stomach wall and the metastasis of local lymph nodes. Usually, stage I has the best prognosis, and the 5-year survival rate usually reaches over 80%, stage II can reach over 50%, stage III can reach over 30%, and stage IV has the lowest 5-year survival rate, which is around 10% or even lower. Radical resection of gastric cancer includes radical resection of proximal gastric cancer, radical resection of distal gastric cancer, and radical resection of the whole stomach, or even the whole stomach combined with surrounding organs. The specific surgical approach is based on the location of the tumor and the scope and size of the resection. In general, total gastrectomy is usually applied to gastric cancer in the cardia or Borrmann type 4. Therefore, the survival time after total gastric resection depends on the pathological stage of gastric cancer after surgery, that is, the depth of cancer cells infiltrating the stomach wall and the metastasis of local lymph nodes.