Do beauty practitioners (beauticians) have to hold health certificates?

Yes, beauty belongs to the service industry, and the service industry needs to apply for a health certificate to engage in it.

Management is done by local CDC.

So you just need to go to the CDC, 50 yuan. Generally, you can get the license after 5 working days.

Physical examination is also required when handling. It's best to go on an empty stomach in the morning and have a blood test.