1. School of Public Policy and Management, China University of Mining and Technology, Xuzhou 221116, China
2. School of Marxism, Hebei University of Engineering, Handan 056038, China
3. School of Management Engineering and Business, Hebei University of Engineering, Handan 056038, China
4. School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
5. School of Earth Science and Engineering, Hebei University of Engineering, Handan 056038, China