In astrological fortune-telling, Yin Na is often used to indicate a person's birth year, that is, Yin Na's life year. Therefore, the people born in Wuchen and Jisi are Dalinmu, those born in Wuwu and Jisi are the fire of life in the sky, those born in Gengyin and Xinmao are Matsumura, and those born in Bingshen and Ding Younian are the fire of life at the foot of the mountain.