Use some soft intermediate colors and cool colors indoors. Such as blue, green, etc. Green is easier to relax, relieve visual fatigue and has an eye-catching effect. The desk is just a beam. Just like layering, if the desk straddles the beam, it will cause physical and psychological stress, and it is useless to cover it with wooden boards, because the roof beam itself is made of a pile of iron bars, which will be induced by metal magnetic waves and affect the mood. Similarly, the chair should also avoid helplessness in the back. There should be no objects on the head of the chair, otherwise it will also bring a sense of depression to the child.
Metaphysics is a profound knowledge, which can help people know more about the mysteries of nature. Even since 2 1 century, the name of metaphysics is even louder than the name of science. For the record, the answer is for reference only. Please don't be blind and superstitious.