Funding for this research was provided by:
2022 Key research project of the Chinese Minis-try of Education (DCA220449)
the Beijing Education Science Plan 2021 Key Project (CDAA 21048)
Article History
Received: 10 April 2023
Accepted: 5 July 2023
First Online: 3 August 2023
Declarations
:
: All procedures performed in the study involving human participants were in accordance with the World Medical Association Declaration of Helsinki. The research participants and their parents agreed to participate in the study and their complete anonymity was ensured.
: The authors declare that they have no conflict of interest.