Baojianshan Neolithic Echoes

Baojianshan Cave A sits within the limestone hills of Longzhou County, Chongzuo City in Guangxi — a karst landscape that funnels rainfall and preserves deep archaeological deposits. Radiocarbon-anchored material from layers attributed to the Baojianshan Neolithic spans roughly 6400–4400 BCE. Archaeological data indicates repeated human use of the cave during the early to middle Neolithic, a period when communities across southern China were experimenting with new subsistence strategies and occupying coastal and riverine environments.

Limited evidence suggests these cave occupants were part of a broader mosaic of southern Chinese foragers and early cultivators. Seasonal mobility, use of sheltered rock cavities, and localized toolkits would have characterized life here, while the ecological setting — river valleys, wetlands and tropical forests — shaped diets and movement. The Baojianshan sequence therefore offers a deep-time glimpse of communities on the maritime and inland routes that link southern China with mainland Southeast Asia. While the material record at the site is important regionally, the small number of recovered human genomes means claims about population origins must remain cautious and provisional.

Two human individuals from Baojianshan Cave A yielded ancient mitochondrial genomes assigned to haplogroup M75. This maternal marker is nested within the broader macro-haplogroup M, which is widespread across Asia. The presence of M75 in both recovered individuals suggests maternal continuity at this locale during the mid-Holocene, and aligns with a pattern in which southern China and adjacent Southeast Asia harbor deep maternal lineages potentially involved in early coastal and inland dispersals.

Crucially, only two samples are available — a very small dataset — so population-level inferences are preliminary. No Y-chromosome (paternal) haplogroup information was reported from these individuals, preventing direct insights into male-mediated migrations or paternal continuity. Genetically, the data are best interpreted as a tantalizing hint: they document ancient maternal ancestry in Guangxi that can be compared with later and geographically broader datasets to test models of continuity, gene flow, and interactions between Neolithic communities of southern China and Southeast Asia. Until larger sample sizes and genome-wide data are available, any narrative of demographic change remains tentative.