He, Lifeng https://orcid.org/0000-0002-4553-9582
Zhang, Ning https://orcid.org/0000-0001-5227-7819
Yin, Lemin https://orcid.org/0000-0003-4814-8437
Funding for this research was provided by:
National Natural Science Foundation of China (71403138)
Qingdao Social Science Program (QDSKL1601077)
Shandong Humanities and Social Sciences Research Program of Colleges and Universities (J16YF15)
Article History
First Online: 15 February 2018