Inclusion Criteria:

- written informed consent provided

- 18~75 years old

- patients with histopathological proved hepatocellular carcinoma received hepatectomy
and had at least one risk factor of recurrence

- without any lymph node or distant metastasis (any T N0M0)

- liver function: Child-Pugh A or B

- Performance status: Karnofsky (KPS)≥70 or world health organization(WHO) score 0,1

- life expectation>6 months

- no dysfunction of major organs

- no prior radiotherapy

- negative for human immunodeficiency virus syndrome (HIV)

- Considerable to computed tomography(CT) simulation and 3D-CRT or IMRT

Exclusion Criteria:

- malignant tumors of other sits

- combining severe diseases, such as acute myocardial infarction(AMI), arrhythmias,
infection

- surgery performed in other hospitals without details

- pregnant woman or woman need to breast feed or woman with positive chorionic
gonadotrophin (HCG)