Postoperative recurrence rate of hepatocellular carcinoma and portal vein carcinoma embolism is high. Possible effective therapeutic measures to prevent postoperative recurrence have been proven to include: 1. 4.Postoperative prophylactic systemic intravenous chemotherapy and radiotherapy are being tested, and both methods may be effective; 5.Preoperative interventions have not been proven to be effective in preventing recurrence and may increase the risk of surgery, so they are not recommended for routine use.