How to set the stair position of duplex residence reasonably?

In interior planning, it is best to build stairs in the auspicious position of the house. Houses with different orientations have different auspicious orientations. For example, our house faces south, and the stairs will be built in the east. If the house faces west, the stairs should be built in the southwest. If the orientation of the house is southeast and northwest, then we'd better build the house in the west.