1. Ministry of Civil Affairs of the People’s Republic of China. Three Departments Released the Fourth Survey Results on the Living Conditions of Older People in Urban and Rural Areas of China. Bejing: MCAPRC; 2016. http://jnjd.mca.gov.cn/article/zyjd/xxck/201610/20161000886652.shtml.
2. World Health Organization. China Country Assessment Report on Ageing and Health; 2016. https://apps.who.int/iris/bitstream/handle/10665/194271/9789245509318-chi.pdf;jsessionid=C9BC37A9539B634A884F201B051AE6A1?sequence=5.
3. Ageing – a biological perspective;Molecular Aspects of Medicine,1995
4. Modern biological theories of aging;Aging and Disease,2010