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Authors
Weng, Gangmin
Pan, Yue
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Funding
Funding for this research was provided by:
National Social Science Foundation of China (19FGLB001)
Hebei Province Foundation for Graduate Innovation (CXZZBS2019063)
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Article History
Received: 25 November 2019
Accepted: 5 April 2020
First Online: 26 May 2020
Compliance with Ethical Standards
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: Gangmin Weng has received research grants from the National Social Science Foundation of China. Yue Pan has received research grants from the Hebei Province Foundation for Graduate Innovation. The authors declare that they have no conflict of interest.
