Funding for this research was provided by:
General Project for Educational Studies of Shanghai Planning of Philosophy and Social Science (A1709)
Shanghai Pujiang Program (17PJC026)
Text and Data Mining valid from 2019-05-29
First Online: 29 May 2019
Compliance with Ethical Standards
: All the authors of this article have no conflict of interest
: All procedures performed in studies involving human participants were in accordance with the ethical standards of East China Normal University and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors. Informed consent was obtained from all individual participants included in the study.