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Dian Basin in Yunnan province is an important center for both early agricultural production and centralized state formation. Settled agricultural villages are present in the province since at least the third millennium BC, and by the first millennium BC, the Dian Culture, a highly specialized bronze polity, flourished in the Dian Basin and surrounding area, until it was conquered by the Han in 109 BC. The increased deployment of flotation at recent archaeological excavations in Yunnan allowed the reconstruction of agricultural practices from the Neolithic to the early Bronze Age, documented at Baiyangcun, Haimenkou, and Xueshan among others. However, archaeobotanical evidence relating to the pivotal period right before and after the Han conquest have so far been lacking, with only limited written records about agricultural production in the Shiji by Sima Qian. Here we present for the first time direct archaeobotanical evidence relating to this transitional period as revealed by rich Han period deposits found during the 2016 excavation of Hebosuo, the largest Dian settlement investigated in Yunnan so far, dated by direct AMS on charred cereal grains and artefactual evidence as spanning from between 850 BC–220 AD. Following the Han conquest, the main components of the agricultural system did not undergo radical changes, but the weedy flora indicates a heavier reliance of wet-land rice systems, evidencing a higher level of water management or even irrigation practices, and the consequent intensification of the agricultural production. These findings on shifting agricultural regimes in Yunnan also contribute to current debates about the interplay between intensification, food risk, and ecology in times of political instability. [ABSTRACT FROM AUTHOR]

In combination with published archaeobotanical data, a detailed paleodietary reconstruction is performed here on human teeth (n = 19) using starch grain and phytolith analysis of dental calculus as well as stable isotope ratio analysis of bulk dentinal collagen. The site studied is Xueshan which is a Late Bronze Age (2700–1700 BP) settlement in Yunnan Province, China. Isotopic results show that this population consumed a predominately C3 diet except for one individual that consumed a mixed C3/C4 diet. Starch grains and phytoliths embedded in the dental calculus indicate that a diverse array of plant resources, including C3 cereals (wheat, rice, barley, buckwheat, beans), C4 cereals (millets), and roots and tubers were directly consumed. Comparison of the results presented here with a review of published works on microfossil analysis of human dental calculus from China not only confirms the dietary diversity of Late Bronze Age Yunnan, but also sheds light on the complexity of human-plant food relationships in this region. [ABSTRACT FROM AUTHOR]

Discussions on colonialism are pervasive in western scholarship but are hardly ever applied to the archeology of China. The present paper shows how concepts of colonialism and migration research can be successfully applied to understand Han imperial expansion into southwest China and how the Chinese material can in turn contribute to developing theories and methods of colonialism research further. Taking the Shamaoshan cemetery as a case study, the present paper combines archeological, textual, environmental, and isotope data to gain insights into strategies and processes of Han imperial expansion into southwest China. The insights gained here show that the long-accepted story-line of simple "Sinicization" and political control is far from accurate. Instead, it took over a century of cross-cultural exchange with immigrants and locals adopting each other's customs to varying degrees. While in the beginning the Han seem to have taken a top-down approach to "civilizing" the region through their elites, the present study suggests that in the end it was the lower levels of society that intermingled most intensively and helped integrate migrants and locals successfully. Moving away from the exclusive focus on exceptional graves and large sites, the present study thus shows the great value of approaching small, poorly equipped graves with new methods, combining isotope research with a nuanced analysis of burial remains. Evaluated together with the evidence from the well-known exceptional graves, lesser-known settlement material, and historical accounts, the Shamaoshan case study has made it clear that various types of contact, colonial and otherwise, play out quite differently within different social groups and historical situations. This study thus proposes a multisource, multimethod approach that moves away from a narrative dominated by the history-writing elite segments of the colonizing force to a multivoiced account integrating local and outside perceptions at various social levels, an approach that might successfully be applied in other parts of the world. [ABSTRACT FROM AUTHOR]