Were the cave-burial people of Guangxi the ancestors of today's Kra–Dai and Hmong–Mien speakers? Ancient DNA says yes — and reveals that cross-border Hmong–Mien kept more southern ancestry than their kin inside China.
Fourteen new genomes from Guangxi cave burials confirm them as ancestors of Kra–Dai and Hmong–Mien speakers, while revealing an unexpected gap: Southeast Asian Hmong–Mien retain far more ancient southern ancestry than their counterparts inside China.
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