Solid wall backing is best.
In geomantic omen, it is best to have a solid wall behind the sofa as the backing, which can form a stable situation and make people feel safe and stable.
Avoid being helpless behind your back
If there are windows, doors or passages behind the sofa and there is no solid wall as the backing, there will be a situation of escape, which makes people feel insecure. In order to solve this problem, you can put a low cabinet or screen behind the sofa, which can form an artificial backer and improve feng shui.
There should be no water.
In Feng Shui, there should be no water behind the sofa. Therefore, it is taboo to put the fish tank behind the sofa. Similarly, it is unlucky to put decorative decorations with water such as fish tanks and feng shui wheels on the low cabinets behind the sofa. However, it is a good choice to fill the back space with evergreen plants, which is beneficial to feng shui.