The ancestral graves were flooded by geomantic omen.

1. In the Book of Changes, the geomantic omen of Yin House pays attention to water and sand all around, and likes water all around. But it is forbidden for water to invade the tomb through the Ming hall. Whether it is the water in Mingtang or accidental water, the ancestral grave is flooded, which has a great influence on the geomantic omen of the ancestral grave. On the one hand, it will dissipate gas, on the other hand, it will make the dead cold, which will naturally ruin the fortune and even health of future generations.

2. In geomantic omen, the water-soaked coffin is a big killer. If the geomantic omen of ancestral graves is flooded and left untreated for a long time, it will lead to flooding in the graves, which will lead to blisters on the bones and make ancestors unable to rest in peace. It is difficult for nature to protect future generations.

3. If the ancestral grave is flooded, the geomantic pattern of the whole ancestral grave will be destroyed in the geomantic aspect of the yin house, and the spirit of the yin house will be washed away, which is not conducive to the ancestors' rest in peace.

4. In terms of health, the ancestral graves are flooded, and the descendants of Feng Shui are weak, afraid of cold, prone to rheumatism, asthma, colds and other diseases, and must move their graves in case of accidents.