The labial midline divides 1/3 under the face into two parts: 1: 2. The average face length 182- 186mm is divided into five equal parts according to the width of eyes. The tip of the nose, lower lip and chin are connected in a line, and the upper lip and lower lip are slightly contracted to this line. The golden section divides a line segment into two parts so that the ratio of one part to the total length is equal to the ratio of the other part to this part.
Its ratio is an irrational number, and the approximate value of the first three digits is 0.6 18. Because the shape designed according to this ratio is very beautiful, it is called golden section, also called Chinese-foreign ratio. In western women, the distance from the eyes to the mouth accounts for 36% of the face length, and the distance between the eyes accounts for 46% of the face width. Oriental women's eyes-to-mouth account for 33% of the face length, and the eye spacing accounts for 42% of the face width.
From the forehead hairline to the brow bone, from the brow bone to the bottom of the nose, from the bottom of the nose to the chin, each accounts for 1/3 of the face length. Refers to the proportion of face width, which is divided into five equal parts by the length of eye shape, from the left hairline to the right hairline, that is, five eye shapes. There is an eye distance between the eyes, and the distance from the outside of the eyes to the hairline is one eye, each accounting for 1/5.