"What are the cave site selection, soil requirements, cave style and layout in the cave?" ① Selection of kiln site: it is advisable to choose the southwest direction, with relatively high terrain, no tombs nearby, no water seepage and no mountain torrents passing by, and close to the water intake (except tap water). ② Soil quality requirements: primary clay should be selected. ..... If it belongs to semi-primitive, non-primitive, sandy and slope shale, in addition to the necessary kiln support, permanent reinforcement support (A reinforced concrete, B rubble concrete and C brick masonry) should be made in front wall, portal arch and kiln according to the stability, which will increase investment. (3) Cave-style: The cave-style structure is characterized by an arched roof with high outside and low inside. One hole and one large function room (2 or 3 rooms can be separated), the doors or windows of each hole are connected with each other by a transverse arch channel, and there are wooden boards or bricks with doors and windows (with upper and lower shutters) between each function hole and the channel. The distance between caves shall not be less than the thickness of effective load (determined according to the load at the top of the kiln). (4) Layout in the cave: the living room is opened by the cave in the middle, and the front side of the living room is provided with an arc passage leading to the left and right functional caves (bedroom, study, kitchen and bathroom).