Qiu, Yang-Cong http://orcid.org/0000-0002-3981-9094
Funding for this research was provided by:
Natural Science Program for Young Creative Talents of Innovation Enhancing College Project of Department of Education of Guangdong Province (2017GKQNCX111, 2018-KJZX039)
Article History
Received: 30 October 2019
Accepted: 4 December 2019
First Online: 11 December 2019
Competing interests
: The author declares that he has no competing interests.