Abstract
The posterity of the Huangs have lived in Huangjiadawu. It consists of four kinds of fundamental units; type A, type B, type C, type D. Other rural houses consist of two fundamental units; type A, type E. Each fundamental unit has a tianjing, a tang and passages. We classified fundamental units according to their differences. An axis consists of a tianjing, a tang and passages. The main axis is more important than the sub axis and the little sub axis. Compared with fundamental units (type B, type C, type E) and axes of other rural houses, we clarified the following results. (1) Type E developed into type C in the little sub axis. (2) Type E developed into type B in the sub axis. (3) Type D is merely in Huangjiadawu. Their causes are the increase of rooms, the establishment of passages and the enlargement of living systems.
