About the Authors

Liang Frank Shao

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

mingliangshao@foxmail.com

Affiliation School of Economics, Henan University, Kaifeng, Henan, China

Competing Interests

The authors have declared that no competing interests exist.