1. School of Innovation and Entrepreneurship, Shandong University, Qingdao 266237, China
2. School of Finance, Hunan University of Finance and Economics, Changsha 410025, China
3. Office of Science and Technology, Shandong University, Qingdao 266237, China
4. Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China
5. School of Environment, Tsinghua University, Beijing 100084, China
6. Chinese Academy of Natural Resources Economics, Beijing 101149, China