The hepatitis B half test does not require an empty stomach. The hepatitis B half test consists of hepatitis B surface antigen, hepatitis B surface antibody, hepatitis B e antigen, hepatitis B e antibody and hepatitis B core antibody. The hepatitis B half test can not only clarify whether the infection is hepatitis B, the existence of protective antibodies, but also clarify the specific situation of hepatitis B, to guide clinical diagnosis and treatment. However, the hepatitis B two-to-one virus does not clarify the presence of liver function damage and abnormal liver morphology, which require further clarification through liver function and liver imaging, and need to be performed on an empty stomach. However, clinical tests are sometimes not definitive with one test alone, and it may be necessary to perform multiple tests simultaneously for a more accurate assessment and diagnosis of the disease. Therefore, when performing hepatobiliary system tests, you should try to go to the hospital on an empty stomach. However, if it is clear that only a hepatitis B two-to-one test can be performed, it is not necessary to maintain a fasting state.