Side face killing means that the face value of the side face is enough to kill the opposite sex or fans. Side face, as the name implies, is the face value of the side face. When a person's face is at a side angle of 45 degrees to 60 degrees, the advantages of the five senses will be strengthened and become more beautiful and charming.

The general aesthetic standards of silhouette are: full forehead, slightly concave mountain root, high nose, not short or thick nose wing, slightly upturned nose tip, slightly upturned upper jaw, slightly upturned chin with clear lines, obvious chin lip groove, and no forward or backward chin.