What are the taboos of house decoration feng shui?

In the geomantic layout of houses, there are still many stresses about placing decorations in different areas of the family. For example, in the living room, the taboo of ornaments is not to hang sharp things in the living room, such as knives, swords and guns. In the bedroom, one of the biggest taboos is that you can't hang a mirror in the bedroom. The porch taboo is that you can't hang a mirror when you go out.