Funding for this research was provided by:
National Natural Science Foundation of China (71934001, 71471001, 41771568, 71533004)
National Key Research and Development Program of China (2016YFA0602500)
the Strategic Priority Research Program of Chinese Academy of Sciences (XDA23070400)
Youth Project of Humanities and Social Sciences Research from the Ministry of Education of China (16YJCZH155)
the Humanities and Social Science Research Project of the Education Department in Liaoning, China (LN2017QN001)
the Social Science Foundation of Liaoning Province, China (L18AJY006, L18BJY024)
Fundamental Research Funds for the Central Universities (JBK2001044)
Article History
First Online: 22 July 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.