1.Avoid sun exposure two weeks before surgery, otherwise pigmentation and scarring will easily occur. 2.Make a habit of applying sunscreen. 3, Two weeks before surgery, start using fruit acid products (e.g. Corexit whitening gel, active serum/cream/emulsion, Bexu cream), L-VC serum, hydroquinone cream, and transaminic acid, which help to whiten skin tone, improve skin’s self-renewal ability, and increase the effect of laser/intense light treatment. 4. The better the hydration status of the skin, the more obvious the improvement will be after the treatment. Therefore, it is important to correct the dry skin condition before the procedure by using strong moisturizing cream (three generations of fruit acids) and moisturizing mask (once a day or every other day). 5, Certain people are not suitable for laser/intense light treatment, such as pregnant women, breastfeeding women, patients with malignant tumors, endocrine disorders (such as hyperthyroidism, etc.), serious cardiovascular or other systemic diseases, mental disorders, unrealistic illusions about the efficacy, keloids, oral retinoids within six months, and inability to follow medical advice well. 6. Minimally invasive lasers such as fractional laser or image beam laser must be evaluated for skin before treatment. If the skin is too dark, more pigmentation, chloasma activity, and sensitive skin (red blood), it is recommended to have strong pulse light treatment once, and then after half a month. If there are more acne blackheads pimples, or dull, atrophic skin tone, it is recommended to perform fruit acid resurfacing once, followed by laser treatment 1 week later. This will reduce these post-operative side effects (more than 60%) and shorten the recovery time (2-3 days). 7. Certain lasers require the application of surface anesthetic (compound lidocaine cream) before surgery, 3-4 sticks are required for the full face, and the cling film is sealed after application to achieve the best anesthetic effect after 1-2 hours.