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Radiocarbon dates from Zhiwuyuan (A), Dalongdong (B), Anhe (C), and Nanguanlidong (D), calibrated in a Bayesian model incorporating phasing by OxCal 4.4 (Bronk Ramsey, 2009) using the IntCal20 atmospheric curve (Reimer et al., 2020; References of previous data and details of all data are presented in Supplementary Table S2).
