Appearance, also known as look, face and face, refers to the structural form, texture, outline of the head, face and facial features, as well as the appearance and color of a person. Appearance is not only the embodiment of human vitality, but also the externalized form of inner activity. Appearance is the most important part of human beauty, and is the central part and object of human aesthetics. The head and face are the most important cosmetic organs exposed in the upper part of the human body, and they also concentrate on the personality of human beauty. The contours and lines of the head and face, the shape and coordination of the five senses, and the state and luster of the facial skin leave both intuitive and profound impressions on people. Therefore, to evaluate a person’s beauty or not, the first depends on whether the head and face give people a sense of beauty. It is the first visual impression, which can make people fall in love at first sight, or make people disagreeable. Among the various aesthetic elements of appearance, facial contour is the main body and facade of beauty. Facial contour is the face shape, the English name: facial form, facial contour is an orderly contour of facial bony structures and soft tissues together, a harmonious contour highlights the beauty of people, the opposite is the lack of beauty, and even seriously affect the visual enjoyment of people. There is a famous saying in the West that “beauty is only as deep as the skin, but ugliness is as deep as the bone”, which shows that the perfection of the bony structure of the face is the basis and key to determine the beauty of the appearance. Due to the different genetic factors and cultural backgrounds of different races, there are differences in the aesthetics of face shape. Westerners have a long and narrow face, and they like to have a clear outline in aesthetics, and Western women are beautiful with a sense of hierarchy and three-dimensionality. Eastern people have relatively wide and short faces, and the aesthetic beauty of oval, goose egg-shaped face or melon face is the most beautiful, requiring a soft facial curve, side view with a beautiful arc, this face shape gives oriental women clean, quiet, elegant, gentle temperament. The beauty of the facial contour is about proportional coordination, symmetry and clear lines. The facial contour is in line with or close to the golden rule (width to length ratio of 1:1.618) and the golden trilinear ratio (cheek width: temporal width: jaw angle width = 1:0.8: 0.6), the angle of the jaw angle is close to 116° Facial contour remodeling or plastic surgery is to sculpt the lack of beauty into a heart-warming, beautiful face; is through modern cosmetic surgery and other high-tech methods to change the facial contour and shape of the five senses to make it meet or approach the aesthetic standard or ideal face. The current technology has special techniques to improve facial morphology by excision of facial bones, displacement after disconnection or semi-disconnection, bone grinding plastic surgery, etc. It is usually used for the plastic treatment of clinical manifestations such as enlarged jaw angle, enlarged cheekbone, wide zygomatic arch, receding or skewed chin, and asymmetrical facial shape. With the perfection of surgical techniques and the continuous improvement of surgical instruments, the surgical reshaping of the facial bones according to aesthetic principles is one of the hot spots in cosmetic surgery today. It will also make the whole person appear more confident and youthful. With the development of society and people’s pursuit of beauty, the term “facial contour reshaping” is quietly coming into people’s lives. Look at the TV and movie actresses, which is not topped with a melon face, goose egg face, no wonder many “Cinderella” competition to follow! Now, more and more beauty lovers are joining the ranks of facial contouring. The current facial contouring group is more female, the most important thing is the softness, firmness and streamline of the facial shape. However, there is a growing trend of facial contouring for men, who are looking for a sense of dimensionality and hierarchy. People are beautiful with small faces and sharp chins, and nowadays, with the popularity of face slimming, small-faced beauty has become fashionable.