Funding for this research was provided by:
Humanities and Social Science Foundation of Ministry of Education of China (16JJD840011)
uangzhou 13th Five Year Plan in Philosophy and Social Science (2016GZQN05)
Talent Project of Guangzhou 13th Five Year Plan in Philosophy and Social Science (2017GZZK41)
Received: 24 February 2019
Accepted: 10 May 2019
First Online: 22 May 2019
Ethics approval and consent to participate
: Ethical approval was not required because the study did not contain any studies with human participants or animals performed by any of the authors. This was confirmed by the Research Ethics Committee, School of Public Administration, JiNan University. The author got a permission to access the data from the Chinese Longitudinal Healthy Longevity Survey.
: Not applicable.
: The authors declare that they have no competing interests.
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