Introduction to cave dwellings: The three-story kiln house is the representative of cave dwellings. This form is very rare in the Central Plains and even across the country. It is called a kiln building. On the one hand, it can be seen from the appearance that it has three floors, just like the building we live in now. At the same time, it has the characteristics of a cave dwelling that is warm in winter and cool in summer. The upper two floors of this three-story kiln building are separated by wooden sheds for storing goods. Since the ventilation conditions of the cave are not very good and it is very humid, the wooden sheds can prevent moisture. This is an earthen cave dwelling. The exterior was originally built with blue bricks more than one meter thick, which not only served as a reinforcement, but also showed the Kang family's strong financial resources.