How to repair ancient buildings?

Most of the restoration work is based on the restoration of the site buildings. The characteristics of these buildings are mostly buildings, and only the site environment with foundation exists, which can only be excavated through archaeological work. It is still very difficult to restore the structure of the whole building. The descriptions involved in ancient books are often one-sided, and it is difficult for researchers to obtain relevant information from a few words. There will be some differences in the investigation methods of the same type of sites in different archaeological stages, and the understanding of the same type of buildings in different historical periods will be different.