There are four kinds of infectious diseases, such as hepatitis B virus, hepatitis C antigen, syphilis and AIDS, which need to be checked when opening a health center and running a health certificate. In addition, the following checks are usually required:

1. General examination: including height, weight, poor chest circumference, abdominal circumference and hip circumference.

2. Ophthalmology: including vision, color discrimination, conjunctiva, eyeball and other items.

3. Internal medicine: including cardiopulmonary auscultation, liver palpation, spleen palpation, nervous system examination and other items.

4. Surgery: including lymph, thyroid, spine, limbs and other projects.

5. Blood routine: check blood diseases and carry hepatitis B virus.

6. Chest X-ray: Check the lung condition, such as whether there is shadow or tuberculosis.

7. Liver function: check liver function.

The specific inspection items can be different according to the specific conditions and requirements of the health center. If in doubt, it is recommended to consult relevant departments or professional medical institutions.