Face shape, that is, facial contour, is the most basic part of a person's appearance. The upper part of the face is an arc structure composed of maxilla, cheekbone, temporal bone, frontal bone and parietal bone, while the lower part of the face is determined by mandible. There are many factors that affect the beauty of the face, and the mandible plays a particularly important role in determining the basic structure of the face. For example, China beauty's ideal oval face is slightly round on the top and slightly sharp on the bottom, and the ratio of length to width is completely in line with Huang Jinlv.

Through the clinical practice of 12 plastic surgery, Dean Huang Dayong found that the beauty of a person's appearance is mainly reflected in the lower part of the face, because there are two S-shaped curves from the nose to the lips and from the lips to the chin, which is the part that best reflects the beauty of facial curves. The length of the face and the shape of the lower half depend on the shape and size of the chin. Therefore, the mandible is of special importance in appearance, and the mandibular angle constitutes the most basic line in facial contour.

In the field of plastic surgery, doctors who can operate on skin, muscle and other tissues to beautify their appearance account for the vast majority, but surgeons who can really change the outline of bones and achieve basic beauty are rare. Dean Huang Dayong firmly believes that only basic beauty is true beauty and the most artistic beauty can be achieved. He is a pioneer in reshaping the outline and realizing the basic aesthetic concept of plastic surgery.