About the Authors

Wenwen Zhang

Roles Conceptualization, Formal analysis, Investigation, Project administration, Resources, Supervision, Validation, Writing – review & editing

Affiliation The Center for Studies of Hong Kong, Macao and Pearl River Delta, Sun Yat-sen University, Guangzhou, China

Zongyi Liu

Roles Conceptualization, Data curation, Formal analysis, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

zongyi_liu@mail.nankai.edu.cn

Affiliation School of Economics, Nankai University, Tianjin, China

Competing Interests

The authors have declared that no competing interests exist. I have read the journal’s policy and the authors of this manuscript have the following competing interests.