How long can Changsha's one-year seafarers' health certificate be issued?

According to relevant information: if you are quick, you can come out on the same day. Slow down. The next day. If all the tests are qualified, you will get a health certificate in the afternoon after the physical examination in the morning. Seafarers need to go to the hospital designated by the maritime agency for physical examination, and it is best to complete the physical examination before eleven o'clock, because the blood test results will not come out until after eleven o'clock, so they can't get the health certificate that day.