1 Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China; Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Beijing 100044, China. Electronic address: lifeng@ivpp.ac.cn.
2 Department of Archaeology, Max Planck Institute for the Science of Human History, Jena D-07745, Germany; School of Social Science, the University of Queensland, Brisbane, QLD 4072, Australia; Human Origins Program, Smithsonian Institution, Washington DC 20560-0004, USA.
3 Department of Archaeology, Max Planck Institute for the Science of Human History, Jena D-07745, Germany; School of Social Science, the University of Queensland, Brisbane, QLD 4072, Australia.
4 Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China; Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Beijing 100044, China; University of Chinese Academy of Sciences, Beijing 100049, China.