Funding for this research was provided by:
National Natural Science Foundation of China (71964019, 71502074)
Applied Basic Research Foundation of Yunnan Province (KKS0202008031)
Science Research Foundation of Yunnan Education Bureau (2019Y0042)
Research incentive plan for graduate students in school of management and economics of Kunming University of science and technology (20182109013)
Article History
Received: 12 May 2021
Accepted: 26 September 2021
First Online: 8 October 2021
Declarations
:
: Not applicable.
: Not applicable.
: The authors declare no competing interests.