According to the geomantic principle of Bazhai, you can know what kind of divination it belongs to by looking at the sitting direction of a house. The method is determined by the direction of the door. We stand in the room, facing the door, facing the direction is "direction", facing the direction is "sitting". For example, the gate faces west and the house sits east; When the gate faces southeast, the house sits northwest; If the gate faces northwest, the house will sit in the southeast, and so on. The orientation of the seat and the head must be opposite. The four East Houses are Earthquake House (sitting east to west), Residence House (sitting south to north), Xun House (sitting southeast and northwest) and Kanzhai House (sitting north to south). The four houses in the west are Dry House (from northwest to southeast), Duizhai (from west to east), Genzhai (from northeast to southwest) and Zhai Kun (from southwest to northeast).