The ancients often used "Fiona Fang is everywhere" to describe a person's kindness. The so-called "full heaven" means that the forehead, middle and lower parts are wide, uniform and prominent. Generally speaking, the upper part of the forehead is dominated by reasoning, the middle part is dominated by memory, and the lower part is dominated by intuition. If the three parts are even and full, it shows that this person's intellectual development has a good physiological basis.