In Eastern philosophy, the Yin-Yang and Five Elements classify human face structures into Mok (Wood), Hwa (Fire), To (Earth), Geum (Metal), and Su (Water) types. Each constitution maps to distinct geometric shapes, behavioral traits, and health focus areas. For example, Mok shapes are vertical and straight, embodying intellectual pride, while Hwa types are sharp-chinned and enthusiastic. To types are wide, square-rounded, and highly reliable. Geum types show angular cheekbones and strong discipline, and Su types feature round, fleshy contours with soft adaptability. Recognizing your element helps you leverage natural strengths and offset character limits.