Introduction to the origin of the building: It has been proven that the origin of this high-rise building is the product of the traditional family system. At that time, after families separated, they generally did not build new houses outside, but added floors and extensions on the roofs of the original houses, thus gradually forming this type of high-rise building. The whitening of the roofs and attics actually plays a role in preserving the buildings. Without the annual whitening, the houses built 300 years ago might have been eroded away. Most of the existing buildings were built 100 or 300 years ago, and the oldest ones date back to the 10th century.
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