About the Authors

Yu Zhang

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

Affiliation School of Foreign Studies, China University of Petroleum (East China), Qingdao, Shandong, China

Yuanyuan Liu

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

Affiliation School of Foreign Studies, China University of Petroleum (East China), Qingdao, Shandong, China

Haoran Mao

Roles Investigation, Methodology, Resources, Validation, Writing – review & editing, Formal analysis, Conceptualization

mao@upc.edu.cn

Affiliation School of Foreign Studies, China University of Petroleum (East China), Qingdao, Shandong, China

Junxiang Zhao

Roles Conceptualization, Formal analysis, Investigation, Methodology, Resources, Validation, Writing – original draft

Affiliation Department of Social and Ecological Civilization Studies, Shandong Administration Institute, Jinan, Shandong, China

Competing Interests

The authors have declared that no competing interests exist.