Funding for this research was provided by:
National Natural Science Foundation of China (61370170)
the National Social Science Foundation of China (14CTQ032)
ORCID
Lei-lei KONG: http://orcid.org/0000-0002-4636-3507
Publication History
Received: 2016-06-17
Accepted: 2016-12-12
Crosschecked: 2017-11-01
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany 2017