When building the wall, the wooden column with thick wrist is used as the skeleton, and the fence is made on this basis. Then several thick layers of wet mud are coated on the surface, and firewood is put on it to dry, thus creating a solid and beautiful wall called "wooden bone mud wall". -Dry diaphragm type, mostly used in rainy areas in southern China and ethnic minority areas such as Yunnan and Guizhou. Generally, the ground floor is overhead. It has the advantages of ventilation, moisture-proof and animal prevention, and is very suitable for the southwest subtropical region with hot, humid and rainy climate. This kind of residence is small in scale, generally three to five, and there is no courtyard. Daily life and production activities are solved in one house, especially in areas with few ridges and complex terrain. The ethnic groups that use Ganlan's residential areas are Dai, Zhuang, Dong, Miao, Li, Jingpo, De 'ang and Buyi.