Funding for this research was provided by:
National Social Science Foundation of China (17CGL073)
Natural Science Foundation of Shandong Province (ZR2017BG009)
Students’ Innovation and Entrepreneurship Training Program (S201910360237, S201910360250)
Article History
Received: 17 October 2019
Revised: 28 February 2020
First Online: 24 June 2020