In the mountainous jungles of Yunnan Province, where the snow-fed rivers of the Tibetan Plateau crash into the subtropical forests of Southeast Asia, ancient human history has just revealed another of its long-buried secrets. From sediments and skeletons thousands of years old, scientists have sequenced the DNA of 127 ancient individuals, uncovering deep-rooted population diversity and ghost lineages that challenge long-standing assumptions about the origins of East Asian peoples.
The research, published in Science, and conducted by Fu Qiaomei at the Chinese Academy of Sciences, finds that Yunnan—Southwest China's highland border—is a central missing puzzle piece in the complicated ancestry of both Tibetan and Austroasiatic peoples.
The research extends far beyond the boundaries of China, providing new routes of ancient human migration from Xizang's frigid Tibet plateau to Vietnam and northeast India's tropical lowlands.
Xingyi Ancestry: Identified Through A 7,100 Year Old Skeleton
Perhaps the most breathtaking finding of the study was that of a 7,100-year-old individual retrieved from the Xingyi site in central Yunnan. This person proved to be as genetically unique as one 40,000 years old from the Beijing area—a mind-boggling find that reflects the continued presence of a wildly old lineage deep into the Holocene.
Scientists referred to this lineage as Xingyi ancestry, and it is a lineage of humans who branched off from other Asian groups at least 40,000 years ago. This ghost population survived in southwestern China, cut off by the rugged terrain of Yunnan, until it slowly disappeared from the gene record.
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The genome of Xingyi has characteristics in common with current populations of the Qinghai-Xizang Plateau—that is, modern Tibetans—providing essential information about their origin. Hitherto, the unique genetic makeup of Tibetan populations couldn’t be traced.
Now, with the recognition of Xingyi origin, scientists can better understand how an early, basal Asian population in the south intermixed with later arrivals from northern East Asia to create the origins of modern highland dwellers, reports The Global Times.
The heritage of the Xingyi people may not endure in contemporary Yunnan or Guangxi people, but their genes whisper across the ages in the bodies of the inhabitants of the world's highest plateau.
Yunnan’s Forgotten Foragers and the Austroasiatic Dawn
While the Xingyi ghosts disappear from record following 5,100 years ago, they are succeeded in central Yunnan by another ancient population—one whose genetic record continues into modern times. That population, whose DNA spans 5,100 to 1,400 years ago, possessed a unique East Asian ancestry, genetically distinct from both northern and southern East Asians.
Most importantly, this ancestry exhibits a clear genetic link to present-day Austroasiatic speakers, a vast language family of more than 100 million people living throughout Southeast and South Asia. From Cambodia's Khmer to India’s Munda tribes and the hill communities of Laos and Vietnam, Austroasiatic languages have long puzzled linguists and geneticists alike.
The human skeleton of an individual found in ash pit H4 at the Xingyi site, dating to the Early Neolithic period, carried the Basal Asian Xingyi ancestry and was related to the missing ghost ancestry in ancient Tibetan Plateau populations. (Yunnan Archaeology)
For decades, researchers supposed Austroasiatic peoples dispersed alongside early farming cultures. But the ancient Yunnan genomes—predating agriculture—tell a different story. These were not farmers. They were forest-dwellers, foragers, and upland rovers who established the earliest genetic basis of an entire linguistic family.
The Red River Valley, which snakes south from Yunnan into northern Vietnam, now appears to be a likely cradle of Austroasiatic origins. The endurance of this ancestry in Yunnan for more than 3,500 years provides the oldest genetic evidence of Austroasiatic-related populations in Asia.
Yunnan: A Crossroads of Continents and Cultures
But Yunnan’s genetic history does not stop with Tibetans and Austroasiatic peoples. The western and southeastern parts of the province add further complexity to this prehistoric landscape.
In western Yunnan, individuals dating between 3,800 and 1,700 years ago show increasing influence from northern East Asian ancestries—possibly the result of Bronze Age migrations or spreading cultural networks from the Chinese heartland. Meanwhile, southeastern Yunnan reveals a blend of northern and central ancestries, affirming its role as a cultural and genetic hinge between the interior of China and the broader Southeast Asian world.
This incredible diversity—many ancestries existing, shifting, and mixing—positions Yunnan as one of the most genetically dynamic regions in prehistoric East Asia. Its rugged topography and varied climates created both refuge and corridor, sheltering isolated populations while also funneling others through its mountain passes and river valleys.
The genetic information uncovered from these ancient remains explains why modern Yunnan is home to one of China’s most ethnically and linguistically diverse populations, with over 20 officially recognized ethnic groups and countless dialects and traditions thriving in its hills and basins.
A Mosaic of Memory
This research reconfigures the map of prehistoric East Asia. It proves that modern groups like Tibetans and Austroasiatic speakers were not born from single migrations or agricultural revolutions. Instead, they are the result of layered interactions, shaped by millennia of coexistence, adaptation, and occasional erasure in the highlands and lowlands of this critical region.
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It also challenges the old north-to-south paradigm of human movement in Asia. Much of the flow was south-to-north and east-to-west, driven by enduring, localized populations like the Xingyi that held their ground for tens of thousands of years in the lush, secluded folds of Yunnan.
Top image: Population migration, replacement, and the preservation of deeply diverged ancestry in southern East Asia. Source: Prof. Fu Qiaomei's group
By Sahir
References
Wang, T. et al. 2025. Prehistoric genomes from Yunnan reveal ancestry related to Tibetans and Austroasiatic speakers. Science, 388. Available at: DOI:10.1126/science.adq9792.
Yazgen, E. 2025. Ancient Asian human genomes shed light on origins of languages. Available at: https://cosmosmagazine.com/history/archaeology/ancient-human-genome-asia-groups/.
Yuqiao, J. 2025. Latest study links Southwest China's prehistoric populations to Tibetan and Austroasiatic origins. Available at: https://www.globaltimes.cn/page/202505/1335161.shtml.
