Hepatitis B two halves 124 positive is defined as positive 1, 2 and 4 of the hepatitis B two halves test, usually the 1st and 2nd will not be positive at the same time. It is possible for a small number of patients to have this condition and be considered a hepatitis B carrier. Item 1 is Hepatitis B Surface Antigen (HBsAg), and a positive test indicates infection with the Hepatitis B virus. Item 2 is Hepatitis B Surface Antibody (anti-HBs), and positivity suggests protective immunity. Item 4 is Hepatitis B E Antibody (anti-HBe), positive indicates that the replication of Hepatitis B virus is weakened and is not highly infectious. Normally, hepatitis B surface antigen and hepatitis B surface antibody do not coexist because the antibody clears and destroys the antigen. If antigenic variation exists, it is possible to have both antigen and antibody positive at the same time. For 124 positive liver function, it is recommended to consult a doctor for analysis.