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Funding
Funding for this research was provided by:
The key research project of Chongqing comprehensive education reform in 2020 (20JGZ01)
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Article History
Accepted: 14 June 2021
First Online: 23 June 2021
Declarations
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: All procedures performed in studies involving human participants followed the institutional and/or national research committee’s ethical standards and the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: We obtained informed consent from all individual participants included in the study.
: The authors of this study —Xu Wang, Yanling Liu, Bin Ying, and Jie Lin—declare that they have no conflict of interest in this study.
