Traditional houses in igloos

A quadrangle is the most famous quadrangle in Beijing, with four households as one courtyard, which is also the origin of its name. Because Beijing is the capital of Ming and Qing dynasties, and it is located in the north with a large population. This form of living can solve the problem of large population, and many families live in one yard. Moreover, there are generally no high-rise buildings in buildings in the north, which is also related to the cold climate.

B igloos are mainly distributed in North America, surrounded by ice bricks. The local Eskimos mainly make a living by fishing, and the climate in this area is cold. Under such living conditions, houses surrounded by ice bricks can be windproof, warm and convenient to obtain materials.