1. Direction of the door. As can be seen from the eight diagrams orientation map, the east is the location of divination, and the figure represented by divination is the long man. If your door is open in the east, it means that your son is outside, not there. People who live in such a house, no matter which wife you find, must have daughters!
If you want your child to be a scientist in the future, you can put Einstein's portrait on the earthquake site in the east, so that your child can see it every day.
I hope my son will grow up to be a billionaire in the future and post the portrait of Bill Gates in the East.