The recurrence rate of gastric cancer after surgery is related to the stage, molecular typing and biological activity of gastric cancer, etc. The earlier the cancer is detected, the lower the recurrence rate and metastasis rate, and the opposite is true. According to the comprehensive data of global gastric cancer treatment centers, the recurrence rate is defined by the five-year survival rate, and the five-year survival rate of stage I gastric cancer can reach 85%-95%, while the five-year survival rate of stage II gastric cancer drops to 55%, 15%-35% for stage III gastric cancer, and only 2%-5% for stage IV gastric cancer.