Photon rejuvenation, which uses laser wavelength to irradiate the skin, dissolves the melanin under the skin tissue, and then uses the metabolic function of the skin to excrete the melanin under the skin tissue, thus achieving the ideal freckle-removing, whitening and skin rejuvenation effect. Improvement: rough skin, coarse pores, fine lines, dark skin and pigmentation. But in order to ensure the safety and effect of surgery, we must choose a regular plastic surgery hospital.