Grandpa's tomb feng shui
It's too long to elaborate. Your grandfather's grave is really a bad choice. The choice of yin house requires a lot, which is much more difficult than yang house. Judging from your description, it's not very good. Choose a secluded house, don't just rely on a mountain, it is lifeless, and it is not good to plant too many trees. It is very learned to see whether the trees belong to yin or yang, and the orientation of the grave is also very important. If you want to change your luck, you can find a feng shui master to see a cemetery and move the grave. Because from the environment you described, it is a bit difficult to change the geomantic omen around the cemetery.