For the assembly and sale of this aspect of the equipment, is the scope of production, so you need to apply for a medical device production license and medical device registration certificate.
One more thing is that you have to master the core technology of laser cosmetic equipment to pass the application for registration and license, otherwise it is impossible to pass the application, not through the application for production is a serious violation of the law, you need to pay the relevant legal responsibility. I hope the subject is careful.