Funding for this research was provided by:
Guangdong Social Science Foundation (GD18JRZ05)
Philosophy and Social Science Foundation of Hunan Province (GD17XYJ23)
National Natural Science Foundation of the People’s Republic of China (71771057)
the Innovative Foundation (Humanities and Social Sciences) for Higher Education of Guangdong Province (2017 WQNCX053)
Guangdong Natural Science Foundation (2018A030310669)
the Project of Humanities and Social Sciences of the Ministry of Education of China (18YJC790156)
Article History
Received: 14 July 2020
Accepted: 21 October 2020
First Online: 31 October 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest
: Ethics approval was not suitable for this research.
: Consent to Participate was not suitable for this research.
: The authors agree to publication in this journal. The authors confirm:That the work described has not been published before (except in the form of an abstract or as part of a published lecture, review, or thesis);That it is not under consideration for publication elsewhere;That its publication has been approved by all co-authors;That its publication has been approved (tacitly or explicitly) by the responsible authorities at the institution where the work is carried out.