. What are the traditional dwellings of the World Heritage? What are the reasons for their formation (natural causes, social causes)?

The main ones are:Beijing Courtyard, Kiln Cave on the Loess Plateau in Northwest China, Ancient Dwellings in Anhui Province, Hakka Tulou in Fujian and Guangdong Province, etc. and Mongolian Yurt in Mongolia.

Each of the characteristic dwellings, are in the social conditions of the time, to meet the needs of life and production and long-term struggle with the natural environment experience, the process of formation. For example, the residence combines the experience of utilizing the terrain, the experience of adapting to the climate, the experience of utilizing the local materials and the experience of adapting to the environment and so on.