2. There is no obvious difference in the orientation of circular rooms, which is beneficial to the distribution within the family.
3. The area of a circle with the same circumference is 1.273 times that of a square, so more inner courtyard space can be obtained by building a circular building.
4. The outer arc of the fan-shaped room in circular building is longer than the earth wall, and the inner arc is shorter than the wood structure, which saves more materials.
5. The wooden components of circular buildings are of the same size.
6. Feng Shui believes that the round building can be controlled. The scientific explanation is that circular buildings have less resistance to cold air than square buildings, so the influence of evil spirits on rooms is relatively small.
7. From the seismic point of view, the circular building can transmit the horizontal seismic force more evenly, so the model house has stronger seismic performance.
This is mainly due to the formation of climate and geographical influence, not historical reasons.