What do you mean, how to calculate? There is an explanation in that book. Please tell me.

Three strange lives are also called lives with three strange lives, and are generally also called three strange nobles. The so-called three monsters are monsters, and everything is weird. The three strange nobles must be arranged in order, such as May of the first year, Geng Day, when they want to get the land, they are not born in the land of death, and they have to be helped by other auspicious stars.

The three wonders are divided into heaven, man and earth: heaven, heaven and earth. Ren Guixin is a strange person, and the order of heaven and earth should be understood.

Most fortune tellers know that it may come from the Book of Changes (but I didn't find it).