Funding for this research was provided by:
National Natural Science Foundation of China (71503039)
Social Science Fund of Jiangsu Province (17GLB008)
the Key Project of Philosophy and Social Science Research in Colleges and Universities of Jiangsu Province (2017ZDIXM013)
Fundamental Research Funds for the Central Universities (2242017K40175;2242018S30008)
Article History
Received: 25 January 2018
Accepted: 22 October 2018
First Online: 29 October 2018