1. From the perspective of building structure, this design is conducive to stabilizing the structure of the whole house and ensuring its firmness. In the design of quadrangles, the main room is usually used as the residence of the owner, while the side room is used as the residence of servants and workers. This classification was the normal state of social life at that time. The partial house is lower than the main house, which can ensure the stability of the center of gravity of the whole house and conform to the scientific principles of architectural design.
2. This design also embodies the concept of Feng Shui. In geomantic omen, the wing in the east represents the host and the wing in the west represents the hostess. Lack of one is not conducive to family development. Therefore, the symmetry and harmony between the east wing and the west wing is regarded as an important feng shui requirement.
It is also in line with people's living habits that the partial house is lower than the main house. When people move in the yard, the eaves of the wing will block the view of the main room to a certain extent, giving people a solemn and depressing feeling, which is also in line with the architectural style of quadrangles.
Generally speaking, the wing of rural quadrangles is shorter than the main room, which is the result of many factors.