Li, Huiyun http://orcid.org/0000-0002-4402-0447
Fu, Shaoyan
Chen, Zheng
Shi, Jing
Yang, Zheyuan
Li, Zhaohai
Funding for this research was provided by:
the National Social Science Foundation of China (18ATJ003)
Beijing Natural Science Foundation (9192020)
Sustainable Development Research Institute for Economy and Society of Beijing (Null)
Article History
Received: 13 April 2019
Accepted: 12 July 2019
First Online: 24 July 2019
Compliance with ethical standards
:
: This article does not contain any studies with human participants or animals performed by any of the authors.
: The authors declare that they have no conflict of interest.