Ma, Shaoqian
Zhang, Yongyou http://orcid.org/0000-0003-2413-9106
Funding for this research was provided by:
the national undergraduate training program for innovation and entrepreneurship (2019X0670)
Article History
Received: 26 June 2020
Accepted: 4 September 2020
First Online: 10 October 2020
Ethics approval
: Not applicable.
: Not applicable.
: The authors declare no competing interests.