In 1973, Pugh, on the basis of Child-Turcotte grading, evaluated liver function by means of a comprehensive score and proposed the Child-Pugh grading criteria for liver function, namely: the presence or absence of hepatic encephalopathy and its degree, ascites, serum bilirubin, serum albumin concentration and prothrombin time in different degrees of five indicators, divided into three levels: grade A is 5 to 6; grade B is 7 to 9; grade C is 10 to 15. The greatest advantage of Child-Pugh grading is that the scoring method is used to estimate the status of liver function, so that the originally independent indicators can be considered comprehensively and thus not be affected by one indicator too much. Wang Jingtao, Department of Surgery II (Hepatobiliary Surgery), Weifang Hospital of Traditional Chinese Medicine, Weifang, China The degree of abnormality of each index was scored 1 point 2 points 3 points Hepatic encephalopathy without 1 degree to 2 degrees 3 degrees to 4 degrees ascites without mild to moderate and above Serum bilirubin (μmol/L) <34.234.2 to 51.3 >51.3 Serum albumin (g/L) ≥3528 to 34 <28 Prothrombin time (sec) ≤1415 to 17 ≥18