Liu, Hong http://orcid.org/0000-0001-7720-275X
Li, Xiaojun
Funding for this research was provided by:
National Planning Office of Philosophy and Social Science (17BTQ069)
Article History
First Online: 8 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest to this work.
: This article does not contain any studies with human participants or animals performed by any of the authors.