Liver cancer is one of the common malignant tumors of the digestive system. For patients with early-stage liver cancer, clinical cure is possible after curative surgery. This clinical cure refers to instances where liver cancer patients, after undergoing curative surgery, do not show signs of recurrence or metastasis over a period exceeding five years. This means there is no invasion of surrounding tissues and no metastasis to distant organs – effectively, the patients have achieved clinical cure. Patients' survival time exceeds five years, or even longer. Therefore, for patients with early-stage liver cancer, because their lesions are relatively limited, achieving clinical cure is possible following curative surgery. However, as the disease progresses to the mid and late stages, even with aggressive surgery and postoperative adjuvant radiotherapy or chemotherapy, most patients cannot achieve clinical cure.