1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment Chinese Academy of Sciences Xi'an China
2. University of Chinese Academy of Sciences Beijing China
3. Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application Xi'an AMS Center of IEECAS and Xi'an Jiaotong University Xi'an China
4. MNR Key Laboratory of Paleomagnetism and Paleotectonic Reconstruction, Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China
5. Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
6. CAS Center for Excellence in Life and Paleoenvironment Beijing China