What's the meaning of Feng Shui robbery?

What are the three evils? At noon, the fire broke out in the south, and the north (Haizi Ugly) rushed for it, which was the three evils (the sea was a robbery, the child was a disaster, and ugliness was also called the tomb evil). Shen enters the water bureau, the water in the north is full, and the south (noon) rushes for it, which is the three evil spirits (afternoon evil spirits, afternoon evil spirits, not old evil spirits).