Funding for this research was provided by:
Independent Research Fund from Beijing Normal University
Foundation for the Author of National Excellent Doctoral Dissertation of the People's Republic of China
Interdisciplinary Research Foundation for the First-Year Doctoral Candidates (BNUXKJC1820)
Article History
Received: 1 November 2017
Accepted: 19 June 2020
First Online: 2 July 2020