Funding for this research was provided by:
National Natural Science Foundation of China (71701221, 71701222, 71601054, 71431007, 71991461)
Natural Science Foundation of Guangdong Province (2016A030313719, 2019A1515010492)
Guangdong Province Universities and Colleges Pearl River Young Scholar Funded Scheme (2017)
the Ministry of Education in China (MOE) Project of Humanities and Social Sciences (17YJC630235)
Guangdong Province Soft Science Research Project (2019A101002074)
Article History
First Online: 20 July 2020