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I wonder what your specific type of apartment is? It is recommended to find a professional feng shui master to help you see the specific situation of your home.
What does feng shui affect sleeping in the living room, isn't this a normal situation, I go to my friend's house and often sleep on the sofa.
The living room and kitchen should be separated by a wall. But glass walls should not be too transparent. Don't be reflective either. This is not only good-looking, but the living room will not take up the brakes of the kitchen.
It depends on the location of your stairs, generally it doesn't matter if there are stairs going down, but if the location is not right, it will be unpleasant.
Living room tiles are diagonally paved in feng shui.
Is there a picture? It depends on the location of the house, the orientation, the position of the pillars and many other relationships.