However, if you are engaged in food manufacturing and sales, you must go to a regular disease prevention center to apply for a health certificate. 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.