What feng shui should I pay attention to before buying an old house that has been abandoned for many years?

In ancient times, this kind of house had to open the roof at least and let the sun shine on the center of the house for 7749 days. This is to make the house sunny, get rid of the shade, and let strangers live.

If modern times do not have this condition, we can light a brazier in the center of the house, also to make the house sunny and burn the ground, and then live in it.

I hope it helps you.