The physical examination of seafarers' certificates is generally carried out in designated hospitals, and it is very strict. The items examined include: height, weight, blood pressure, five senses, blood drawing (blood sugar, blood routine, liver function, kidney function, syphilis, AIDS, hepatitis B surface antigen), electrocardiogram, abdominal B-ultrasound, chest X-ray and urine routine. There are many projects and detailed investigations. After all, I have worked on the ship for a long time and the requirements are more demanding. Everyone should pay more attention.