The most commonly used clinical classification of liver function is Child classification, which is more intuitive and has a greater significance for clinical guidance. The main tests include serum bilirubin, plasma albumin, prothrombin prolongation time, ascites and hepatic encephalopathy. Serum bilirubin is scored 1 if it is <34.2, 2 if it is between 34.2 and 51.3, and 3 if it is >51.3; plasma albumin is scored 1 if it is >35, 2 if it is 28-35, and 3 if it is <28; prothrombin prolongation time is scored 1 if it is 1-3 seconds, 2 if it is 4-6 seconds, and 3 if it is >6 seconds. No ascites was scored as 1, a small amount of ascites was easily controlled as 2, and a moderate amount of ascites was difficult to control as 3. The presence of hepatic encephalopathy was scored as 1, mild hepatic encephalopathy was scored as 2, and more than moderate hepatic encephalopathy was scored as 3. A total score of 5-6 points for good liver function, grade A; 7-9 points for moderate liver function, grade B; and 10 points or more for poor liver function, grade C.