1, thread embedding method: it is a method of embedding suture under the skin through a small incision. It is suitable for young people with little fat in the orbital septum of the upper eyelid and thin and firm skin, as well as those with single eyelid or double eyelid. In addition, the so-called "polymer double eyelid plastic surgery" is actually a method of embedding thread, but the suture used is polymer. 2. Incision and fixation of tarsal plate: For patients with loose skin, bloated upper eyelid, triangular eye and epicanthus, incision is the best method for double eyelid surgery, and for those with unsatisfactory results after double eyelid surgery by embedding thread or suture, this method can be used to remedy it, and it is not easy to recur after surgery. 3. Micro-incision liposuction and catgut embedding: This method is also called liposuction polymer double eyelid plasty. It is necessary to make an incision of about 1mm on the upper eyelid, remove the orbital diaphragm fat from the small incision, and then complete the double eyelid plastic surgery by embedding thread.