What is the eight-character fortune teller sitting on?

Generally speaking, the earthly branches of the two words on the day you were born are heavenly stems (such as Jiazi Day, Jia Muzi Water and aquatic wood), and the earthly branches are beneficial to heavenly stems from the overall situation.

There is a phenomenon that the earth supports the sky, which is also called root. I don't know where this sentence comes from, but I think it should mean this.