Hou Shi s autobiography, this paper finds out both Cao Xueqin s paternal and maternal ancestors as well as Cao Xueqing himself were not Jinlinese, and that the Caos residence was not in Jinling before or after the Caos came down in the world.

The article discusses the construction conditions of urban residence,rural residence and their furnishings of Beisong Dynasty from residential system and description in the painting of the dynasty,which to lay the basic pattern for residential features at later stage of feudal society.