About the Authors

Baohu Li

Roles Writing – original draft, Writing – review & editing

Affiliation School of Languages and Literature, University of South China, Hengyang, China

Guangwei Li

Roles Resources, Supervision, Validation

hu0701002@126.com

Affiliation School of Languages and Literature, University of South China, Hengyang, China

Competing Interests

The authors have declared that no competing interests exist.