Although the micromachining technology is not high, first ask them where the syringes, hyaluronic acid and lidocaine in their hands come from, regardless of whether they have certificates (not 100% nationally recognized from those training institutions). Cotton swab cotton ball disinfection does not pass? Is there a formal invoice for incoming and outgoing items? Did I finish the fine-tuning with you and give you the invoice? What do you want to sue for when something goes wrong?