The sofa is the furniture for daily rest, chatting and meeting guests in the living room. The mirror can't face the sofa in the living room. The living room is a place to entertain guests. If the mirror is facing the sofa, the feng shui atmosphere in the room will be reflected to them twice, but the atmosphere brought by each foreign guest is different from that at home, so that the guests will feel that they have strayed into other people's territory and will make them anxious. And the mirror facing the sofa will make the guests feel monitored, which is very uncomfortable.
In most cases, putting the mirror in the dark, porch, corner and other places is good for Feng Shui.