Corner upturning type: the corner of the eye formed by the meeting of the two ends of the upper and lower lips is upturned, which can produce the feeling of smiling. Mouth drooping type: the two ends of the mouth crack formed by the meeting of the upper and lower lips bend and droop, giving people a feeling of sadness and melancholy. Thin and sharp lips are characterized by high lip peak, small and prominent lip bead, unsmooth lip contour, and sharp lips are often accompanied by narrow nose, which affects the beauty of the whole face. Flat upper lip type: In general, when the upper gum is located in front of the lower gum, such as when the upper gum is located behind the lower gum (commonly known as "floor cover"), the upper lip will retreat and the lower lip will protrude. This lip type is generally thin on the upper lip and thick on the lower lip.