1. Postdoctoral research workstation, China Academy of Science and Technology for Development, Beijing, People's Republic of China
2. Institute of Technology, Economy and Society for Development, China Academy of Science and Technology for Development, Beijing, People's Republic of China
3. School of E-commerce and Logistics, Beijing Technology and Business University, Beijing, People's Republic of China
4. School of International Trade and Economics, University of International Business and Economics, Beijing, People's Republic of China