Funding for this research was provided by:
Natural Science Foundation of Chongqing (cstc2018jcyjAX0457)
Chongqing Municipal Education Commission of Science and Technology Research Project (KJQN201801403)
Innovation and Entrepreneurship Training Program for College Students of Yangtze Normal University (2018ccx172)
the Natural Science Foundation of Fuling District, Chongqing (FLKJ,2018BBA3058)
the Natural Science Foundation of Yangtze Normal University (2017XJQN07)
Article History
Received: 18 April 2020
Accepted: 3 August 2020
First Online: 21 August 2020