Declarations:
Funding: This research is supported by the Major Project of the
National Social Science Fund of China: ”Research on the Theoretical
System, International Experience and Chinese Path of Evidence-based
Social Science” (Project No. 19ZDA142);
Role of Funding Source: The funder had no further role in study
design; in the collection, analysis and interpretation of data; in the
writing of the report; and in the decision to submit the paper for
publication.
Conflict of interests: The all authors declare that there is no
conflict of interests.
Acknowledgements: None.
Authors’ contributions: KLG, JWL, and JYL conceived and
designed the study. NC, YFL and JYL selected the articles and extracted
the data. KLG and JWL analyzed the data. JWL completed some background
writing and KLG wrote the first draft of the manuscript. All authors
were involved in the interpretation of data and contribution to the
writing of the final manuscript.