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Greater Liangshan is one of the few regions of China where, among 70–80% of Nuosu, the Han are a minority. Instead of the much more common phenomenon of ‘Hanification,’ here we can observe Han absorbing traits of other ethnic groups. Based on two seasons of fieldwork combined with historical texts and previous ethnographic research, this paper discusses this phenomenon, raising issues of ethnic identity and the influence of local circumstances on interethnic relations. Throughout the paper, it becomes clear that there is no simple dichotomy between Han and Nuosu, but that the situation is considerably more complex. The Nuosu fall into several castes, and the Han settlers had two different experiences. Some were captured as slaves and tried to become fully Nuosu. Ethnic relations in the Greater Liangshan are thus highly complex and require more research to be thoroughly understood. [ABSTRACT FROM PUBLISHER]

The study of southwest China is vital for understanding the dispersal and development of farming because of the coexistence of millet and rice in this region since the Neolithic period. 1,2 However, the process of the Neolithic transition in southwest China is largely unknown, mainly due to the lack of ancient DNA from the Neolithic period. Here, we report genome-wide data from 11 human samples from the Gaoshan and Haimenkou sites with mixed farming of millet and rice dating to between 4,500 and 3,000 years before present in southwest China. The two ancient groups derived approximately 90% of their ancestry from the Neolithic Yellow River farmers, suggesting a demic diffusion of millet farming to southwest China. We inferred their remaining ancestry to be derived from a Hòabìnhian-related hunter-gatherer lineage. We did not detect rice farmer-related ancestry in the two ancient groups, which indicates that they likely adopted rice farming without genetic assimilation. We, however, observed rice farmer-related ancestry in the formation of some present-day Tibeto-Burman populations. Our results suggested the occurrence of both demic and cultural diffusion in the development of Neolithic mixed farming in some parts of southwest China. • The first ancient human genomes from Late Neolithic to Bronze Age southwest China • Demic diffusion of millet farming from the Yellow River to southwest China • Both millet and rice farmers genetically contributed to present-day Tibeto-Burmans Tao et al. report the ancient human genomes of millet and rice mixed farming populations from Late Neolithic to Bronze Age southwest China. The samples are suggested to derive the majority of their ancestry from the Neolithic Yellow River millet farmers, indicating a demic diffusion of millet farming from north to southwest China. [ABSTRACT FROM AUTHOR]