GPT and chronic hepatitis B virus infection: The classification method is as follows [27]: (1) chronic hepatitis B is divided into HBeAg positive chronic hepatitis B and HBeAg negative chronic hepatitis B; HBeAg positive chronic hepatitis B:ALT (glutamic pyruvic transaminase) of the patients shows repeated or continuous increase, serum HBVDNA, HBsAg and HBeAg are positive, HBeAb test is negative, and liver biopsy shows inflammatory activity.