Different enterprises and jobs need different certificates. Ordinary enterprises or companies do not directly serve end customers, or have nothing to do with food, but only need a general physical examination report. However, if they are engaged in food manufacturing and sales, they must apply for a health certificate at a regular disease prevention center. And this type of work also needs a training certificate. It's not that the health certificate is useless, but the company needs you to use the training certificate to prove that you know some simple health knowledge besides your own health. So, if the company has requirements, you can study and take exams. Easy to pass! I don't want to say it's a formality, but it's a little.