Dish face has a corresponding word in English: ‘Dish face’. This means that the middle of the face is flat, giving the impression that it is like the middle part of a dish, sunken in. The sunken middle of the face often gives people a feeling of old age, a typical example is the “flat-mouthed old lady”. And young and beautiful face is bound to be plump in the middle of the face. This observation of Maggie Cheung, Liu Yifei and other photos is not difficult to conclude. Beauty is an objective existence. It is based on the coordination, proportion, harmony and unity between the soft and hard tissues of the face. I. Proportion and harmony The ancient Chinese painting theory has recorded the “three stops and five eyes” proportional relationship of facial structure. That is, from the hairline to the chin can be divided into three equal parts (hairline to between the eyebrows, between the eyebrows to the nose, under the nose to stop under the chin). And the width of the face is equal to five times the width of the eye fissure. Second, symmetry Third, the coordination of the relationship between the nose, lips and chin is an important symbol of beauty Many studies have shown that the lower 1/3 of the face is the most varied and characterized part of the facial structure. The facial structure caused by many orthognathic surgeries occurs in the lower 1/3 of the face, yet it gives the impression of a ‘facelift’, and even a horizontal osteotomy chinplasty can cause a huge change in the facial structure. The harmony between the three important structures of nose, lip and chin is the most important aesthetic feature of the lower 1/3 of the face. There are many ways to evaluate the nasal, lip, and chin relationships: aesthetic plane, H-line, Z-angle, S-plane, nasolabial angle, chin-labial angle, chin-neck angle, upper lip height, and lower lip-chin height measurements have all been used to evaluate the nasal, lip, and chin relationships. The more important measurements include SNASNB and many others; the candidate needs to turn to a plastic or maxillofacial surgeon for a professional analysis. After the analysis the doctor will give a more objective pathological anatomical diagnosis and then develop a treatment plan accordingly. Treatment of butterfly face: corresponding to the 3 pathological anatomical mechanisms treatment can be divided into 3 strategies: 1, increase the height of the middle facial division: LeFort II, III osteotomy, mid-facial autologous fat/hyaluronic acid/collagen/Medpor filling; pear-shaped hole edge filling, rhinoplasty, etc. 2. Treatment of the lower 1/3 of the receding face: mandibular subapical osteotomy, sagittal split osteotomy of the ascending mandible, horizontal osteotomy of the chin receding, etc. 3. Various combinations of the above two options. Some butterfly face deformities are more complicated, involving the cooperation between orthognathic surgery and orthodontics, the classification of the types of dental and maxillofacial deformities and the matching of various surgical procedures, X-ray cephalometric analysis in orthognathic surgery, post-operative image prediction, model surgery, and ensemble plate, etc.