I. What kind of procedure is liver biopsy? What is the purpose? Ultrasound-guided percutaneous liver biopsy (liver aspiration) is a new technique for the diagnosis and treatment of liver diseases and various tumors. II. What are the indications? 1.For the diagnosis of: various viral hepatitis, liver fibrosis, cirrhosis, liver cancer, fatty liver (inflammation) caused by various reasons, autoimmune liver disease, differential diagnosis of jaundice, diagnosis of some rare diseases: glycogen storage disease. Unique superiority in the differentiation of focal fatty liver, cirrhotic nodules and hepatocellular carcinoma! 2. For treatment: screening of hepatitis B surface antigen carriers before treatment, interventional treatment of benign and malignant liver tumors III. How safe is it? The biopsy is based on the principle of negative pressure attraction, and rapid puncture can be done unknowingly in 0.3 seconds, which has the advantages of simple operation, accurate positioning, safety, painlessness, small trauma, and almost no complications and sequelae.