What should I do if someone builds a new pool behind the grave?

It is taboo for water to enter the grave, especially behind it. Graves are generally built around mountains, with water as light. A pool was built behind it, which was very small. By digging, it broke the momentum of Long Mai. The consequences are self-evident. In addition, Xuanwu has water, so attention should be paid to children's urinary system diseases and kidneys. Poor people can't move their doors, rich people can't move their graves, and ancestral homes are extremely important. Please be careful.