1. College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China
2. College of Economics and Management, Xinjiang Agricultural University, Urumchi, Xinjiang, China
3. Northwest Institute of Historical Environment and Socio-economic Development, Shaanxi Normal University, Xi’an, Shaanxi, China
4. College of Economics and Management, Huazhong Agricultural University, Wuhan, Hubei Province, China