The main courtyard is strewn at random, and the atrium is open and distinct. The main room is high, the wing is low and smaller than the main room. The location where elders live is generally a room with geomantic omen in traditional quadrangles, and the main hall of the main courtyard is not only higher than the wing, but also has one or two more steps. In the geomantic layout of quadrangles, most of the east and west wings are mainly three rooms, aiming at creating the central axis in the courtyard building combination. This line is like a person's backbone, and it is the most important source of geomantic omen in the courtyard.
When designing, it is best to have three east and west wings, otherwise it may bring bad influence to the quadrangle.