Sofa plays an important role in the living room, just like an important port of the country. It must be watered as much as possible to thrive. A good port must have a prominent bend on both sides, shaped like the letter "U". The extended bend is like a hug with arms around it, and the central depression is the receiving position of geomantic omen, which can hide wind and gather gas to achieve wealth. The sofa should also be decorated like a high-class harbor, with one arm sticking out on each side.
The sofa should be supported.
There is a solid wall behind the sofa. If there are windows, doors or passages behind the sofa, there is no backer behind it. Psychologically, the sofa is empty and insecure. If there is really no solid wall behind the sofa.