Funding for this research was provided by:
The Research Program Funds of the Collaborative Innovation Center Assessment toward Basic Education Quality at Beijing Normal University (2020-05-0033-BZPK01)
The Fundamental Research Funds For the Central Universities (2020TS009)
Article History
Accepted: 29 March 2021
First Online: 8 April 2021
Declarations
:
: All procedures performed in studies involving human participants were inaccordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.