Asses the efficacy and safety of the Anti hepatitis B placenta transfer factor injection in the treatment of HBeAg positive chronic hepatitis B.

This study using entecavir tablets as basic therapy, is a randomized, double-blind, placebo-controlled multi center study, including the screening period (-4 weeks), baseline and treatment period (96 weeks). The treatment period of first 48 weeks, using entecavir tablets as basic treatment, placebo-controlled trials; the second 48 weeks, taking entecavir tablets alone, continue observation experiment.

Inclusion Criteria:

1. aged 18-65, sex not limited;
2. patients with HBeAg positive chronic hepatitis B: Screening HBsAg positive for more than 6 months; screening HBeAg positive; screening serum HBV DNA≥1.0×105U/ml；
3. 2 * ULN (2 times the upper limit of normal value) < ALT <10 * ULN (10 times the upper limit of normal value);;
4. total bilirubin <51μmol/L;
5. hepatitis B virus resistance gene sequencing negative;
6. agree in the process of the study, do not participate in any other clinical studies or other anti HBV therapy;
7. before the beginning of the study, understand and sign the informed consent form approved by the ethics committee, and cooperate to conduct clinical research according to the requirements for the study.

Exclusion Criteria:

1. by the following evidences prompt suspected hepatocellular carcinoma: B ultrasound or imaging examination discover occupying lesion;B ultrasound normal but serum alpha fetoprotein (AFP) level has a continuous increasing trend; AFP > 100ng/ml, and after review, still so.
2. with liver disease acute exacerbation cause a transient liver function decompensation disease or baseline with clinical performance of decompensated liver disease;
3. serum creatinine ≥1.5mg/dl (≥130μmol/l);
4. the serum amylase > 2 times the normal reference upper limit value;
5. hemoglobin (male <100g/L, female <90g/L), white blood cell< 3.5* 109/L, platelet< 60 * 109/L;
6. combined with infection of HCV (anti -HCV positive), HIV, anti -HAV IgM positive, anti -HDV IgM positive, anti -HEV IgM positive, anti -EBV IgM positive, anti -CMV IgM positive, autoimmune hepatitis(such as the titer of anti nuclear antibody> 1:160) or activite liver disease caused by other known or unknown reason;
7. investigators consider that may interfere with the treatment,evaluation or compliance of the subjects, including any uncontrolled clinical significance of kidneys, heart, lungs, blood vessels, neurogenic, digestive system, metabolic diseases (diabetes, hyperthyroidism, adrenal disease), immune function disorder or tumor;
8. subjects with a history of alcoholism or drug abuse,investigators consider the subjects cannot comply with this protocol or affect the results analysis;
9. pregnancy,lactation or female subjects plan to conceive or the companions of male subjects plan to conceive during the study
10. 6 months before the study medication used immunosuppressants,immunomodulators(thymosin alpha), cytotoxic drugs;
11. 6 months before the study medication used anti HBV drug therapy (interferon, Lamivudine, Adefovir, Entecavir and Telbivudine, Tenofovir,etc);
12. plan or have had liver transplantation;
13. received other study drug treatment within 3 months prior to screening;
14. drug allergy history or allergic for Nucleoside or Nucleotide drug;
15. the subjects non compliance with the protocol or subjects exist any situation which investigators considered not suitable for participation in this study.