Funding for this research was provided by:
National Natural Science Foundation of China (61370092, 61502154)
Hubei Provincial Department of Education Outstanding Youth Scientific Innovation Team Support Foundation (T201410)
Project of Humanities and Social Sciences (17YJCZH203)
Article History
Received: 21 September 2018
Revised: 29 November 2018
Accepted: 12 December 2018
First Online: 9 January 2019