Because the new site of Beichuan County town is located in the Anchang River alluvial plain, there are relatively thick淤积layers. No new discoveries have been made for the time being, and there are no records about the new site of Beichuan County town in the local chronicles of An County. Considering the situation of siltation, the Sichuan Provincial Cultural Relics and Archaeological Research Institute decided to carry out random underground excavations during the construction process of the new site of Beichuan County town, and to look for the location of the new Beichuan county town...