The PIXEL CO2 laser penetrates the skin through micro-thermal channels formed by the patented beam optics lens, and through these micro-thermal channels thermal effects are generated to form thermal injury zones without damaging the surrounding normal tissues, and these micro-thermal injury zones on the treated areas form the healing mechanism of the tissues, resulting in collagen remodeling, skin tightening and scar improvement. The surrounding normal skin acts as an aid to speed up the recovery of the heated area. At present, our department has this imported laser cosmetic treatment instrument (PIXEL carbon dioxide laser) for trial in January, and we are now recruiting people who are interested in improving acne scarring, skin tightening, skin rejuvenation and wrinkle removal.