Primary liver cancer is usually not hereditary, but the reason why it tends to appear in families in China is mainly due to the widespread infection of hepatitis B virus, which then leads to a significant correlation with hepatic cirrhosis caused by hepatitis B. It is well known that the hepatitis B virus is contagious and can easily be transmitted within families and from mother to child. Therefore, it is not uncommon to see several cases of liver cancer within the same family, indicating a familial aggregation. Another factor is related to dietary habits, for example, the infection of aflatoxin, which is mainly found in moldy peanuts. If the dietary habits within a family are similar, then, of course, the likelihood of occurrence is certainly higher.