Fig. 4From: Research on the historical and cultural value of and protection strategy for rammed earth watchtower houses in Chongqing, ChinaGeographical distribution of ancient immigrants in Chongqing (Source: Xiaoyin Zhang, based on ‘Research on the Geographical Features of the Distribution of Sichuan Indigenous and Immigrants in Qing Dynasty’ and ‘Chongqing Immigration History’)Back to article page