Etiological examination: common causes of cirrhosis include viral hepatitis such as chronic hepatitis B and C, autoimmune liver disease, alcohol factors, and drug factors. Drugs and alcohol are mainly understood by taking medical history. Hepatitis B and C are mainly determined through pathogenic surveillance. Hepatitis B-related tests include the five hepatitis B tests and viral quantification, and hepatitis C-related surveillance includes hepatitis C antibody and viral quantification. Autoantibody and immunoglobulin assays are used to determine the presence or absence of immune liver disease. Liver function tests: 1. Serum liver function tests: mainly include alanine aminotransferase (ALT) and glutamic oxaloacetic aminotransferase (AST) to reflect liver parenchymal cell damage; alkaline phosphatase (ALP) and gamma-glutamyl transpeptidase (GGT) to reflect intrahepatic bile duct damage; bilirubin (including total bilirubin TB, direct bilirubin DB, indirect bilirubin IB) to determine the severity of jaundice and the cause The bilirubin (including total bilirubin TB, direct bilirubin DB, indirect bilirubin IB) is used to determine the severity and cause of jaundice; albumin (ALB), globulin (GLB) and prealbumin (PALB) reflect the protein synthesis function of the liver; cholinesterase (CHE) reflects the reserve capacity of the liver. 3.Coagulation test: prothrombin activity (PTA) reflects the ability of the liver to synthesize coagulation factors. 4.Routine blood test: mainly includes white blood cell count (WBC), red blood cell count (RBC), neutrophil count (N), lymphocyte count (LY), hemoglobin concentration (HGB), platelet count (PLT), etc., reflecting hypersplenism. Morphological examination of liver: abdominal ultrasound examination to understand liver size, morphology, intrahepatic bile duct condition, spleen size, portal vein width, splenic vein width, presence or absence of ascites, presence or absence of occupancy, etc. Based on the results, physicians will decide whether further examinations such as abdominal CT or MRI are needed to clarify liver and spleen condition. Liver elasticity measurement: Early diagnosis of liver fibrosis is an important clinical guidance for treatment decision and prognosis of various chronic liver diseases, but liver puncture biopsy as the “gold standard” of liver fibrosis diagnosis is an invasive operation, which is complicated and relatively costly. It can partially replace liver puncture biopsy and provide a basis for the diagnosis and treatment of liver fibrosis, and is one of the commonly used methods for evaluating the degree of liver fibrosis. In addition, this instrument can also make objective determination of liver fat content, which is an important tool for fatty liver disease condition assessment and efficacy evaluation.