The geomantic omen of ancestral graves has influenced generations.

It depends on the size of the cave in the ancestral grave. The most auspicious 300 years, the small auspicious 200 to 30 years. It is customary to say that ancestral graves affect three generations, but it does not mean three generations. It warns people that good feng shui affects many generations, and at the same time, because some feng shui can only last for 200 to 30 years, it is time for three generations to find feng shui.