1, generalized fatigue and weakness, decreased appetite, nausea, anorexia of grease, deepening of urine color such as strong tea-like and other manifestations, should be checked for liver function indexes. 2.Hepatitis B surface antigen (HBsAg) carriers, chronic hepatitis B, cirrhosis and hepatocellular carcinoma patients in the family should be checked for liver function indicators and hepatitis B five indicators. 3.Those who have received blood transfusion, plasma and other blood products, shared or used syringes that are not strictly sterilized, and those who have received hemodialysis and organ transplants should be tested for liver function indexes, Hepatitis C antibody and Hepatitis C virus RNA. 4.Those who have been in close contact with hepatitis patients within half a month to six months should be tested for liver function indexes and corresponding hepatitis pathogen indexes. 5, long-term heavy drinking, obesity, diabetes, hyperlipidemia and long-term use of liver-damaging drugs should be regular (1 to 2 times a year) physical examination, liver function indexes and liver ultrasound and other tests.