Do a chest X-ray first, and it will take ten seconds. Then there is stool examination, who takes a cotton swab, goes to the toilet, turns it around in his ass and takes it out; Then lie down and the doctor presses your abdomen and nearby parts; Finally, draw blood, at the joint of the arm, it doesn't hurt.
These four things are simple. Go to the designated institution to get the certificate after one week. You have to pay a handling fee, more than ten yuan. You have to make a food safety test paper first and copy the answer directly to you. They are all multiple-choice questions.