Funding for this research was provided by:
the Chongqing Social Science Doctoral Program (2019BS055)
Chongqing Technology and Business University scientific research fund (1955048)
First Online: 13 June 2020
Compliance with Ethical Standards
: The author(s) declared no potential conflicts of interest with respect to the research, author- ship, and/or publication of this article.
: Ethics Committee approval was obtained from the Institutional Ethics Committee of Sichuan University to the commencement of the study.
: We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers/animals were followed during the course of this research.