[1] National Bureau of Statistics of the People’s Republic of China. The seventh national census bulletin (No. 5). 2021.http://www.stats.gov.cn/tjsj/tjgb/rkpcgb/qgrkpcgb/202106/t20210628_1818824.html. [2022-4-18]. (In Chinese).  http://www.stats.gov.cn/tjsj/tjgb/rkpcgb/qgrkpcgb/202106/t20210628_1818824.html
[2] The Lancet. Ageing in China: a ticking bomb. Lancet 2016;388(10056):2058. http://dx.doi.org/10.1016/S0140-6736(16)32058-XCrossRef
[3] Wang HM. Blue book of elderly health: research and policy implementation of healthy aging in China. Beijing: Chinese Financial & Economic Publishing House. 2020. (In Chinese). 
[4] The State Council. The state council on the issuance of the “14th Five-Year Plan” national aging career notice of the development and elderly service system planning.2022. http://www.gov.cn/zhengce/content/2022-02/21/content_5674844.htm. [2022-2-24]. (In Chinese).  http://www.gov.cn/zhengce/content/2022-02/21/content_5674844.htm
[5] The Communist Party of China Central Committee and the State Council. “Healthy China 2030” Blueprint.2016. http://www.gov.cn/zhengce/2016-10/25/content_5124174.htm. [2022-2-24]. (In Chinese).  http://www.gov.cn/zhengce/2016-10/25/content_5124174.htm