In young people, facial fat wraps around the angle of the jaw and the lower edge of the body of the jaw, and the transition between the jaw and the neck is more natural. As the face ages, the boundaries between the jaw and the neck become less and less distinct. This not only leads to a reduction in the prominence of the mandible at rest, but also exacerbates the postural laxity of the jaw. The filling of the mandibular angle and the lower edge of the mandibular body includes not only the anterior but also the lower part. In the anterior part, the needle is inserted through a small incision perpendicular to the lower edge of the mandible. In the lower part, the needle is injected through an incision located about 1cm above the angle of the jaw, and the fat is injected in a fan shape to the outside and below, so that the fat can be injected above the neck and more than 1cm below the angle of the jaw and the lower edge of the body of the jaw, which not only makes the jaw contour clearer, but also “borrows skin” from the neck and serves to lift the The skin of the neck is lifted. In addition, the skin of the upper neck is placed in the shadow of the mandible, creating a visual receding effect. The filler goes inward to the midline, where the fat is placed in the anterior mandibular sulcus and submental area to provide a suspension. This helps to reduce the isolated appearance of the aging chin and also serves to lift the chin forward and upward. To achieve a further chin lift, a beaded injection technique can be applied through a lateral incision towards the midline to fill in the chin. 20ml of autologous fat can be injected into the jaw and chin. Nasolabial Fold Filling The nasolabial fold can be seen as the area where the cheek joins the lip and chin. An incision is taken on the lateral side of the nasolabial fold and the fat is injected perpendicular to the direction of the nasolabial fold, reaching as far as the midpersonal ridge. Using a beaded injection technique, the fat is injected across the nasolabial fold in the direction of the nasolabial fold. Be sure not to inject fat parallel to the direction of the nasolabial fold, as this will cause the position of the nasolabial fold to shift inward. The structure of the marionette line is similar to the nasolabial fold and is treated similarly. The fat should be injected perpendicular to the direction of the fold to sever the ligaments in this area. If desired, injections can be made through the same incision into the anterior jawline. Again, the marionette fold is not an isolated structure and requires attention to its relationship to the adjacent cheek. In general, 1 to 2 ml of each side of the nasolabial fold and the marionette line need to be injected.