1. School of Economics and Management, Chang’an University, Xi’an, People’s Republic of China
2. School of Management Engineering, Zhengzhou University of Aeronautics, Zhengzhou, Henan, People’s Republic of China
3. School of Economics and Management, Tsinghua University, Beijing, People’s Republic of China
4. Institute of Soil Environment, Shaanxi Provincial Academy of Environmental Science, Xi’an, People’s Republic of China
5. Department of Surveying and Mapping, Baoji Geotechnical Investigation & Surveying Institute, Baoji, People’s Republic of China
6. Marketing Department of Dongguan Zhong Tian Electronic Technologies Co., Ltd. Xi’an Branch, Xi’an, People’s Republic of China