Funding for this research was provided by:
Project of the National Key R&D Program of China (2017YFC1600605)
Project of Beijing Philosophy and Social Science (17GLB013)
Project of National Social Science Foundation of China (15BGL202)
Beijing's "High-grade, Precision and Advanced Discipline Construction (Municipal)-Business Administration" project (No.19005902053)
Article History
First Online: 13 January 2020
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: This article does not report any studies involving human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.