When placing the sofa, it is required to have a backrest behind it, that is, it must be against a solid wall. If there is a window, door or passage behind the sofa, and there is no solid wall to rely on, it means that there is no backing behind the sofa, and it is empty. Conducive to career development. If there is really no reliable solid wall behind the sofa, a workaround is to place a low cabinet or screen behind the sofa, which is called an "artificial backer", which can also play a remedial role.