1. Barcelona clinical (BCLC) staging of hepatocellular carcinoma Very early stage (0) PS 0, Child A grade, single lesion, diameter <2cm (carcinoma in situ) Early stage (A) PS 0, Child A, B grade, 1 to 3 lesions, diameter <3cm Intermediate stage (B) PS 0, Child A, B grade, multiple node-like lesions Late stage (C) PS 1-2, Child A, B Portal vein invasion, lymph node metastasis, distant metastasis End-stage (D) PS >2, Child C PS (performance status) Physical status 2. Chinese staging of hepatocellular carcinoma (Guangzhou, 2001) Ⅰa : single tumor maximum diameter <3cm, no cancer embolus, abdominal lymph nodes and distant metastasis; liver function classification Child A. Ⅰb : single or two The sum of the maximum diameter of single or two tumors <5 cm, in the half liver, without cancerous emboli, abdominal lymph nodes and distant metastases; liver function classification Child A. Ⅱa: The sum of the maximum diameter of single or two tumors <10 cm, in the half liver or the sum of the maximum diameter of two tumors <5 cm, in the left and right half liver, without cancerous emboli, abdominal lymph nodes and distant metastases; liver function classification Child A. Ⅱb: The sum of the maximum diameter of single or two tumors IIIb: tumor status regardless, cancer embolus or metastasis regardless; liver function grade Child A or B. IIIb: tumor status regardless, cancer embolus or metastasis regardless; liver function grade Child C.