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Authors
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Funding
Funding for this research was provided by:
Natural Science Foundation of Shandong Province (ZR2020MF033)
National Bureau of Statistics of China (2022LZ31)
National Natural Science Foundation of China (61502280)
General project of science and technology plan of Beijing Municipal Commission of Education (KM202010017001)
Natural Science Foundation of Shandong Province (ZR2022MG059)
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Article History
Received: 21 March 2022
Accepted: 15 November 2022
First Online: 5 December 2022
Declarations
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: This article does not contain any studies with human participants or animals performed by any of the authors.
: The authors declare no competing interests.
