Fractional laser technology is the most popular and latest skin aesthetic technology in the global skin industry, a minimally invasive treatment between invasive and non-invasive. I. Mechanism of action Fractional laser uses a fractional laser system, using the ablative effect of the laser on the tissue, it can make micro-holes with a diameter of 120-1200 microns on the skin, with a hole spacing of 500 microns, stimulating the damaged part of the dermal tissue for repair, so that the dermis produces more collagen and rearranges it, playing a skin rejuvenation effect. Second, the applicable treatment range 1, acne and acne scars, scars, etc. treatment; 2, peeling, repair photoaging, large pores, rough skin; 3, eyelids, crow’s feet and other fine lines around the eyes to remove. Third, the technical advantages in the treatment, the laser directly penetrates the site to form a matrix of small white dots. The skin around these dots immediately starts the horizontal repair mechanism, and within 8 hours the epidermis is completely healed and can be washed and bathed. 3-6 days or so, the scabs at the dots fall off and the skin returns to normal appearance. And the internal collagen regeneration can take up to 6 months, or even 6 years.