Seen from the front, the starting point of the mountain root is generally located near the line connecting the two inner corners of the eyes, and a natural double C line is formed from the eyebrows to the bridge of the nose, which satisfies the concern of the width-narrow-wide from the eyebrows-the mountain root-the nose. In other words, the position of the mountain root is the thinnest part. However, this statement is not absolute. The position of the starting point of the mountain root should be comprehensively judged according to its forehead, brow bone, eye socket and atrium.

Viewed from the side, the line from the mountain root to the bridge of the eyebrows, the line from the eyebrows to the starting point of the mountain root, and the line from the mountain root to the tip of the nose form a nasal frontal angle, which is the best at 120- 130 degrees. If the angle is too large and close to the right angle, it will form Tian Tong's nose, which looks fake. If the angle is too small, the higher the stereoscopic effect, which will make the nose look higher visually. ?