Feng, Xue http://orcid.org/0000-0002-8921-7825
Shang, Xiaopu http://orcid.org/0000-0002-7872-5744
Xu, Yuan http://orcid.org/0000-0001-9589-6046
Wang, Jun http://orcid.org/0000-0001-7522-8593
Funding for this research was provided by:
Innovative Research Group Project of the National Natural Science Foundation of China (61702023)
Humanities and Social Science Foundation of Ministry of Education of China (17YJC870015)
Beijing Natural Science Foundation (7192107)
Beijing Social Science Foundation (19JDGLB022)
Article History
Received: 3 January 2020
Accepted: 2 April 2020
First Online: 5 May 2020