Funding for this research was provided by:
National Social Science Fund of China (18BJL069)
Social Science Planning Project of Shandong Province (21CJJJ17, 21BZBJ15)
Natural Science Foundation of Shandong Province (ZR2020MG008, ZR2022QG020)
Qingdao Social Science Planning Project (QDSKL2, 201, 229)
Article History
Received: 25 November 2022
Accepted: 16 February 2023
First Online: 7 March 2023
Declarations
:
: Not applicable.
: Not applicable.
: The authors declare no competing interests.