The premarital medical examination is a mandatory checkup for both men and women. Marriage examination items for men include: 1. asking about family history, history of infectious diseases, understanding personal hobbies, living and working environment, whether there is a habit of smoking and drinking. The examination of the reproductive system and general examination: including height, weight, blood pressure, thyroid, limbs and reproductive system. 3. laboratory tests: including blood, urine routine, liver function, hepatitis series, semen routine laboratory tests.