Funding for this research was provided by:
National Natural Science Foundation of China (71771057)
Innovative Foundation (Humanities and Social Sciences) for Higher Education of Guangdong Province (2015WCXTD009, 2017WQNCX053)
Guangdong Social Science Foundation (GD17XYJ23)
Guangdong Social Science Foundation in Finance (GD18JRZ05)
Guangdong Natural Science Foundation (2018A030310669)
Humanities and social sciences fund of the Ministry of Education (18YJC790156)
Major Applied Project for Universities of Guangdong (2017WZDXM011)
Publication History
Received: 2019-02-21
Accepted: 2019-06-10
Published: 2019-07-10