What do the three evils in Feng Shui and the land with heavy water vapor mean?

The three evil spirits in Feng Shui are mainly divided into robbery, disaster and old evil spirits. Moreover, the mage also told us: take the year of 2008 as an example, whenever the lunar calendar sets in the afternoon, the north is the third year; Shen nian, south three years old; Years ago, the west was the third evil spirit of the year; The ugly year is the third evil spirit in the East. If the selected place belongs to the evil direction, it is considered that the dragon turtle instrument is placed in the east, with its head facing outward and its tail facing inward, and the light must be turned on.