Avoid:
1, don't put it at the door, it's too straightforward.
2, don't face the family, the mountain is not good.
Suitable:
1, behind the door, there is a backer behind it.
2, the key position of the yard, the town house effect.
In short, it's ok if it's pleasing to the eye and doesn't matter. This is the most direct truth, and other people's theories are accumulated in this way. Don't be superstitious