Funding for this research was provided by:
the Chinese ministry of education humanities and social science research project (17XJC190006)
the talent introduction project of Chongqing University of Arts and Sciences (R2019FJY36)
Article History
First Online: 14 August 2020
Compliance with Ethical Standards
: This study was carried out in accordance with the guidelines from the Ethics Committee of Chongqing University of Arts and Science, at which the researchers are based, and in accordance with the 1964 Declaration of Helsinki, its later amendments, and comparable ethical standards. All participants provided written informed consent.
: The authors declare that they have no conflict of interest.