Cliff, Sunken, And Hoop

The next day the guide took the team to the nearest and oldest dwellings, the cliffside yaodongs. He told them that this is the most common of all types. In this type, people dig caves in the cliff that has a rectangular floor and the top arched. In the front, the place ahs open space for proper lighting and cross ventilation, so that the people do not feel suffocation.
Then they have, sunken yaodongs, as the name suggests, this place is the pits on the flat ground. This kind is found in the majority.
Then last we have hoop yaodongs, also called independent yaodong. They are the most valuable because of their construction techniques. These types of dwellings occur where there are no conditions excavations of cave dwellings.