Compare to the Safety of Efavirenz and Nevirapine in Treating HIV Positive Patients With Mild Baseline Liver Function Test Impairment, and/or Hepatitis B or Hepatitis C Co-infection

Inclusion Criteria: (Patients must meet all of the following criteria to enter this study.) * Patients must be \>18years of age and \< 60 years of age * Patients must be antiretroviral naive and have a HIV-1 RNA level≥500 copies/ml * Patients with AST or ALT \> 2x the upper limit of normal, and TBIL \> 1.5x the upper limit of normal * CD4 count to be \<250 in female patients and \<350 in male patients at entry * Hemoglobin content to be \> 90g/L * Neutrophil cell count to be \> 0.75 x 109/L * Patients must be willing to accept the Exclusion criteria: (Patients meeting one or more of the following criteria will not be enrolled in this study.) * Patients with allergies to or other contraindications for the selected ARV regimens. * AST or ALT \> 5x the upper limit of normal * TBIL\>2.5 x the upper limit of normal * TB co-infection and other co-infection * Pregnant or breastfeeding women * Intravenous drug users * Patient's education level that would interfere with the medical, adherence and withdrawal symptoms evaluation.