Funding for this research was provided by:
National Office for Philosophy and Social Sciences (19CTJ008)
Xingliao Talent Program (XLYC1907012)
Article History
Received: 2 June 2020
Accepted: 14 September 2020
First Online: 3 October 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
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