Funding for this research was provided by:
Youth Fund of General Project on Humanities and Social Science Research of the Ministry of Education of the People’s Republic of China (19YJCZH079)
Article History
Received: 14 November 2019
Accepted: 24 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: All the data in the paper are drawn from the official and open materials and it is not involved in private or clinical data.
: Not applicable.
: The authors declare that they have no competing interests.