1. Department of Archaeology and Anthropology, School of Humanities, University of Chinese Academy of Sciences, Beijing, People’s Republic of China
2. College of Tourism, Qinghai Nationalities University, Xining, People’s Republic of China
3. Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, People’s Republic of China
4. School of Geographical Science, Qinghai Normal University, Xining, People’s Republic of China