It’s just a way of saying fortune-telling. Originally, fire and earth were not separated. Have you discovered that Si, Wu, Wei, and the fire in the south all contain earth. When Wu and Wei are combined, if fire is strong, it will become fire; if earth is strong, it will become earth. It all depends on the combination of horoscopes.
Therefore, fortune books generally say: the sun and the moon are not combined at noon, where the sun (sun) is fire and the moon (moon) is earth