Introduction to residence sites: The types of residences of ancestors in ancient times can be roughly divided into cave dwellings, nest dwellings, wind fences, tents, civil buildings, cave dwellings, railing buildings and other forms. Different regions, different customs, different climate conditions, etc. have different performances. However, according to the analysis of the excavated Banpo site in Xi'an, the ancestors here have developed residences that are roughly equivalent to civil buildings.