Funding for this research was provided by:
The Ministry of Education Humanities and Social Science Research Project (18YJA190003, 18YJA190003)
Article History
Received: 13 April 2020
Accepted: 4 July 2020
First Online: 15 July 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The research protocol was approved by the Institutional Review Board of the authors’ institute, the local education departments and the principal of each school. All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The Informed consent was obtained from all participants included in this study.