Former Suzaku, later Xuanwu, left Qinglong and right White Tiger, have you ever heard of this word? In practice, south is the front, north is the back, east is the left, and west is the right. Before the opening of the southeast, the corresponding Qinglong and Suzaku were auspicious things. The west corresponds to the white tiger master's suffocation, and opening the door is to welcome it. Moreover, feng shui has always been taboo to open double doors, which means breaking money.
I hope I can help you.