Funding for this research was provided by:
The Fundamental Research Funds for the Central Universities in China (2017XKQY087)
The Humanities and Social Sciences Research Funds of Chinese Education Ministry (17YJA630104)
Educational scientific planning project of Jiangsu Province (C-b/2016/01/22)
National Science Foundation of China (71302140)
Double First-Class Initiative Project for Cultural Evolution and Creation of China University of Mining and Technology (2018WHCC03/05)
Postgraduate Educational Reform Project of Jiangsu Province (JGZZ16_079)
Article History
First Online: 5 November 2018
Compliance with Ethical Standards
:
: On behalf of all authors, the corresponding author states that there are no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.