Peng, Wei
Xin, Baogui http://orcid.org/0000-0002-7739-4808
Funding for this research was provided by:
National Planning Office of Philosophy and Social Science (16FJY008)
Natural Science Foundation of Shandong Province (ZR2016FM26)
The innovation program of Shandong University of Science and Technology (SDKDYC190114)
Article History
Received: 4 April 2019
Accepted: 11 November 2019
First Online: 16 December 2019
Competing interests
: The authors declare that they have no competing interests.