1. Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2. Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Key Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences, Beijing 100044, China
5. Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China