Funding for this research was provided by:
Ministry of Science and Technology of China (2018YFE0196500)
the Green&low-carbon Team of Research Center for Economy of Upper Reaches of the Yangtze River in Chongqing Technology and Business University (CJSYTD702)
Chongqing Technology and Business University (1953004)
Chongqing Federation of Social Science Circles (2018BS60)
Article History
Received: 8 March 2020
Accepted: 6 January 2021
First Online: 19 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.