Archives, through their original record nature, construct the historical cognitive foundation of the Chinese national community. Their dual functions as both evidence and memory continually reinforce the collective identity of "where we come from". The historical archival records of the Dai people's exchange, interaction, and integration-whether in their external binding and form or their internal textual content-reflect the grand historical process of the Dai people and other ethnic groups jointly building Chinese civilization. These archives vividly illustrate the core values of the Chinese national community spirit. By examining the material forms of historical Dai-language archival records and cross-verifying their diverse textual contents, this study delves into the historical facts of ethnic relations embedded in the themes of "exchange, interaction, and integration". Furthermore, it excavates exemplary cultural elements such as "the Chinese nation as one family", providing historical annotations and theoretical references for strengthening the consciousness of the Chinese national community.