https://orcid.org/0000-0001-8880-7711
About the Authors
- Congxin Li
-
Contributed equally to this work with: Congxin Li, Guozhu Li
Roles Writing – original draft
Affiliation School of Economics, Hebei GEO University, Shijiazhuang, Hebei Province, China
- Guozhu Li
-
Contributed equally to this work with: Congxin Li, Guozhu Li
Roles Methodology, Writing – review & editing
* E-mail: guozhuli@126.com
Affiliation School of Economics, Hebei GEO University, Shijiazhuang, Hebei Province, China
Competing Interests
All authors declare that there are no conflicts of interest in this paper.