1. The buried suture method (also known as the polymer molding method) is a method in which sutures (or polymer sutures) are directly buried between the skin and the lid, causing the upper eyelid skin to adhere to the lid to form a double eyelid surgery. This method is easy to perform, less traumatic, does not leave scars, quick to reduce swelling, and does not require stitching, and is more suitable for young people with thin eyelids, long eye fissures, and no loose skin; it is less suitable for people with thicker eyelids, loose skin, and older people, and there is a possibility that the double eyelid surgery will disappear. 2, cut double eyelid surgery method, is a permanent double eyelid surgery, it is through the incision, remove loose skin, orbicularis oculi muscle and hypertrophic fat, under direct vision direct skin with orbicularis oculi muscle or upper eyelid muscle tendon membrane sutured together, the formation of double eyelid surgery. This method requires a skin incision and is slightly more traumatic, but the incision allows for structural adjustment of the upper eyelid and provides reliable, long-lasting results for all cases of single lids. It takes slightly longer to reduce swelling and the wound will leave a linear scar. 3. The pressed double eyelid method, similar to suturing, is a procedure in which the mucosa is sutured through the skin to form a double eyelid. This is because the upper eyelid is continuously sutured throughout, blocking vascular reflux, making the upper eyelid swollen and slow to swell, and requiring suture removal. There are several types of double eyelid surgery, but there are many variations in the various types, adding up to no less than a hundred. Regardless of the method used, the principle is mostly the same. In clinical practice, it is necessary to choose the procedure according to the conditions of the patient (such as lid shape, face shape, etc.), and not to apply one method uniformly, but to make it different from one person to another, so that the effect made can meet each situation and highlight the personality and achieve the perfect effect.