Ginsenoside Rg3 group: general treatment + ginsenoside Rg3 Control group (placebo group): general treatment + placebo 4.Method of group assignment: 5research centers, central-block-stratified randomization, a ratio of active drug group to control group: 2:1 5.Dose and mode of administration: Ginsenoside Rg3 group: ginsenoside Rg3 20mg BID, two months as one cycle, continue until recurrence occurs Placebo Group: placebo, 2 capsules, BID, continue until recurrence occurs 6.Study period: Screening phase: screening for enrollment within 8 weeks after the radical resection Follow up: review every 2-3 months following the surgery Post-trial investigation: within 28 days after the trial is ended or the recurrence occurs