We thank the sixth Gung-Thang Living Buddha, the anonymous monk, L. L. Wang and her husband for providing us the opportunity to study the fossil; D. Madsen, J. Brantingham, D. Rhode, C. Perreault, J. S. Yang, T. Cheng, X. K. Shen, J. T. Yao, Z. X. Yang, J. Chen, X. Z. Huang, M. H. Qiu and C.-R. Huang for their assistance with the fieldwork and in the laboratory; members of the local government of Xiahe County and Ganjia town for help, the monks in the Baishiya temple and people from Bajiao Ancient City for their support of the fieldwork; O. Jöris, G. Smith, P. Ungar and R. Grün for discussions and comments; many curators and colleagues who, over the years, gave us access to recent and fossil hominin specimens for computed tomography scanning, photogrammetry or analysis; E. Trinkaus for providing comparative data; H. Temming, S. Tuepke, C. Molenaar and Diondo for their technical assistance; S. Pääbo, V. Slon and A. Ayinuer-Petri for ancient DNA analytical support. We received support from the Strategic Priority Research Program of Chinese Academy of Sciences, Pan-Third Pole Environment Study for a Green Silk Road (Pan-TPE) (XDA20040000) and National Natural Science Foundation of China (41620104007). D.J.Z. received support from National Natural Science Foundation of China (41771225). Fieldwork in 2018 was supported by the Second Tibetan Plateau Scientific Expedition (Project no. 4). U–Th dating was supported by the Science Vanguard Research Program of the Ministry of Science and Technology (107-2119-M-002-051) and the Higher Education Sprout Project of the Ministry of Education, Taiwan (107L901001). J.-J.H. and F.W. thank the Max Planck Society for providing financial support.

Reviewer information

Nature thanks Aida Gómez-Robles, Antonio Rosas and the other anonymous reviewer(s) for their contribution to the peer review of this work.