Efficacy and Safety of Antiviral Therapy With Peg-interferon for Chronic Hepatitis B Complicated With Nonalcoholic Fatty Liver Disease（OCEAN PROJECT）

Inclusion Criteria: 1. Age of 18-60 years old, male or female (including 18 and 60 years old); 2. meet the diagnostic criteria for chronic hepatitis B in the Guidelines for the prevention and treatment of chronic hepatitis B (2022 edition), and meet the imaging diagnostic criteria for fatty liver in the guidelines for the prevention and treatment of non-alcoholic fatty liver disease (2018 Update edition). 3. serum HBsAg positive \>6 months; 4. NAs treatment: baseline HBsAg≤1500 IU/ml, HBeAg negative, HBV DNA negative (not detected); 5. IHC initial treatment: baseline HBsAg\<1000 IU/ml, HBeAg negative, HBV DNA negative (undetectable), ALT and AST persistently normal (ULN: \<50 IU/L in men, \<40 IU/L in women); 6. a negative serum pregnancy test within 24 hours before the first dose (for women of reproductive age); 7. willing to receive treatment and signed informed consent. Exclusion Criteria: 1. co-infection with active hepatitis A, C, D, E and/or HIV; Or combined with drug-induced liver injury, inherited metabolic liver disease, autoimmune hepatitis, alcoholic liver disease; 2. Liver tumor was detected by liver imaging at the time of screening; 3. patients diagnosed with hepatitis B cirrhosis, that is, those with liver biopsy pathology consistent with liver cirrhosis, or with two or more of the following five criteria, excluding non-cirrhotic portal hypertension: ① imaging examination showed signs of liver cirrhosis and/or portal hypertension; ② Esophagogastric varices were found by endoscopy; ③ Liver stiffness was consistent with cirrhosis; ④ Blood biochemical examination showed decreased albumin level (\< 35 g/L) and/or prolonged prothrombin time (prolonged \> 3 seconds compared with the control); ⑤ Blood routine examination showed platelet count \< 100×109/L; 4. pregnant or lactating women or those who plan to become pregnant and do not want to use contraception during the study period; 5. neutrophil count \<1.5×109/L or platelet count \<90×109/L. Patients with creatinine higher than 1.5 times the upper limit of normal; 6. The patients and their close relatives (parents, siblings, etc.) had a history of severe mental illness, especially depression. Severe psychosis is defined as severe depression or psychosis, suicide attempt, hospitalization due to psychosis, or a period of incapacitation due to psychosis; 7. patients with a history of immune-mediated diseases (e.g., inflammatory bowel disease, idiopathic thrombocytopenic purpura, lupus erythematosus, autoimmune hemolytic anemia, scleroderma, severe psoriasis, rheumatoid arthritis) or abnormally elevated levels of autoimmune antibodies; 8. patients with serious diseases of heart, lung, kidney, brain, blood and other important organs, and patients with other malignant tumors; 9. history of severe epilepsy or current use of antiepileptic drugs. Control of unstable diabetes, hypertension, thyroid disease, etc. A history of severe retinopathy or other evidence of retinopathy; 10. any history of organ transplantation and existing functional graft (except corneal or hair transplantation); 11. patients who are allergic to interferon and its drug components, and who are not suitable for interferon according to the investigator's judgment; 12. Patients deemed by the investigator to be ineligible for the study.