The health certificate needs to check the following contents: the chest X-ray, mainly to check whether there is tuberculosis, whether there is lung occupation; electrocardiogram, to check whether there is insufficient blood supply to the myocardium; blood test of the liver function of glutamic acid aminotransferase, if glutamic acid aminotransferase appears to be more than twice as high as the other items, it is necessary to check the antibody of hepatitis A, hepatitis B, hepatitis C, and hepatitis E, to exclude the infectious hepatitis. In addition, when doing the health certificate, you need to do the internal medicine examination, which usually asks about the family genetic history, excludes the genetic history of mental diseases, and examines the heart and lungs; the surgery examines the height, weight, and examines the spine, limbs, and joints. One other test that is required for a health certificate is a stool culture, Vibrio cholerae, S. typhi, and S. paratyphi, to check for these infectious diseases of the intestines.