This is a retrospective cross-sectional observational clinical study. We will collect clinical medical records of patients diagnosed with chronic hepatitis B combined with metabolic associated fatty liver disease who received treatment at Foshan Hospital of Traditional Chinese Medicine. The main purpose is to explore the characteristics of renal function related indicators in these patients, analyze the influencing factors of early renal tubular injury caused by long-term antiviral therapy, and summarize the clinical correlation between liver metabolic abnormalities and early kidney damage. No additional invasive examinations or intervention measures will be performed on patients; only existing historical inpatient and outpatient medical data will be sorted out and statistically analyzed. All personal privacy information of subjects will be strictly desensitized and protected throughout the study