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Authors
Jiang, Mingfei
Dai, Baozhen
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Funding
Funding for this research was provided by:
Major Project of the National Social Science Fund of China (23&ZD188)
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Article History
Received: 26 February 2024
Accepted: 30 December 2024
First Online: 27 February 2025
Declarations
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: All participants provided informed consent, and the protocol was approved by the Ethical Review Board of Peking University (approval number: IRB00001052-11,015).
: Not applicable.
: The authors declare no competing interests.
: The data that support the findings of this study are available from the Institute of Social Science Survey, Peking University, Beijing, China (). Data for 2020 will be available upon request to the corresponding author.
