Zhang, Ye
Wu, Xiyan
Li, Jiawei
Li, Hongjie
Zhao, Yongbin
Zhou, Hui
Article History
Received: 19 May 2017
Revised: 2 August 2017
Accepted: 9 August 2017
First Online: 5 December 2017
Compliance with Ethical Standards
:
: This study was approved by the Institute of Cultural and Historical Relics and Archaeology in the Inner Mongolia Nationality Autonomous Region in China, and the State Administration of Cultural Heritage of China. All necessary permits were obtained for the described study, which complied with all relevant regulations. We have no financial and personal relationships with people or organisations that can inappropriately influence our work.