Inclusion Criteria:  First clinical diagnosis of primary liver cancer (China liver cancer staging, CNLC Ia stage); Child-Pugh grading standard of liver function was GRADE A or B; 18-66 years old; Complete clinical case data; limited surgical methods (local resection); Voluntarily participate in the study and sign the informed consent.  Exclusion Criteria:  There are basic diseases that cannot tolerate surgery (such as severe cardiopulmonary cerebral renal insufficiency); Tumor thrombus or distant metastasis was found in main portal vein and primary branch, main hepatic vein and branch, main hepatic vein and inferior vena cava by preoperative imaging examination; planned pregnancy, unplanned pregnancy and pregnancy; Preoperative child-Pugh grading standard of liver function was Grade C. Disease researchers that the investigator considers inappropriate to participate in this clinical trial.