Chengdu Rongya Cosmetic Surgery, Chengdu Rongya Plastic Surgery Hospital, etc. They are all institutions with good equipment and technology in Chengdu, which can be used for reference in repairing scars. At present, there are five most popular methods to repair scars in clinic: laser scar removal, injection scar removal, surgical scar removal, chemical peeling, skin scraping and so on. Different methods, such as injection scar removal, are aimed at concave scars, and surgical resection is more effective for hyperplastic convex scars. Injection scar removal is suitable for repairing sunken scars, such as acne pits left by acne. There are many injection materials available for scar removal by injection, such as hyaluronic acid, collagen and other artificial preparations, as well as autologous tissues such as autologous fat.