The pinna is the outermost edge of the auricular cartilage, which is the area where the auricular cartilage is curled. The ear chakra is in the shape of a question mark, and at the top front of the ear, the costal cartilage of the ear chakra will extend backward and inward toward the location of the ear canal opening, which is also known as the foot of the ear chakra, and the location of the foot of the ear chakra is also where the preauricular fistula is most likely to occur. The foot of the ear wheel looks like it bulges upward, walks backward, and then points downward toward the earlobe. The ear wheel is a more important symbol of the ear, especially for ear reconstruction surgery, the shape of the ear wheel is done so that the shape of the ear can be expressed, and the ear wheel is also an area that is easily injured by ear trauma.