Xu is the sun lord, representing the person. He was born in the month of Zi, which is November. In November, the water is cold and the earth is frozen. Zi is also born in a prosperous land for wealth, and wealth is prosperous. The Seven Kills (Partial Officials) of the Heavenly Stem reveal that those born in Ziyue are in order, and they have roots in the earthly branches, so the Seven Kills are prosperous. If the Heavenly Stem is partly printed, it will not be ordered if you are born in the Zi month, and the fire will not be strong in winter. Therefore, the Wu soil of Zi month should be water as the god of use, and metal as the god of happiness. This is the analysis of prosperous and weak Bazi.