Huaier Granule for Prevention of Recurrence and Metastasis of Stage II and III Non-small Cell Lung Cancer (NSCLC)

Inclusion Criteria: * Patients with complete resection who are at TNM (primary tumor, regional nodes, metastasis) stage II-Ⅲa, postoperative pathology confirmed for non-small cell lung cancer; * Has completed four cycle standard solution of adjuvant chemotherapy, or refused to accept the postoperative adjuvant chemotherapy; * Patients between 18 and 70 years old, no gender restriction; * Eastern Cooperative Oncology Group (ECOG) PS of two or less; * Before the start of the study, patient fully understands the study and is willing to sign the informed consent form; Exclusion Criteria: * Receiving adjuvant chemotherapy patients started greater than 24 weeks from surgical resection; * Refused adjuvant chemotherapy patients started greater than 8 weeks from surgical resection; * Suspected malignant pleural effusion; * There is no clear pathological diagnosis; * Combined with other cancer; * Patient have a positive surgical margin; * Accept other treatment for lung cancer of postoperative； * Combined with severe idiopathic disease of liver, kidney and hematopoietic system; * Combined psychosis or AIDS; * Allergy to the test drug; * Pregnant or lactating women; * Participation in any other clinical trial within three months; * Conditions that are considered not suitable for this study investigators.