Facial makeup is very important because it is related to the coordination of the whole face. The key of mandibular makeup is to draw orthognathic sulcus, which can not only highlight the whole mandible, but also adjust the length and width of the mandible. To draw the mandibular sulcus, you should adjust the position of the mandibular sulcus according to your face shape, and then draw a small arc downward at the depression at the junction of mouth and jaw with flesh color. Because everyone's chin is different, we should make up according to different chin types: round chin, which can smudge from cheek to neck; Long chin, you can add horizontal shadow color under the chin; Sharp chin, chin with a little shadow color, upper edge diluted with rouge; Under the square forehead, you can add shadow color to the prominent part and smudge it in the direction of the neck, but be careful not to let the neck shadow; Double mandible, you can add shadow color to the facial contour from cheek to mandible, neck and throat.