Based on a national survey conducted by the National Bureau of Statistics, Chinas elderly population (aged 60 and above) had reached 249 million by the end of 2018, making up about 17.9％ of the total population; those aged 65 and above totaled 167 million, accounting for 11.9％ of the total population. The 2013"China Aging Development Report"pointed out that the severity of the aging problems in China was unprecedented. Population aging is accompanied by increased prevalence of various age-related chronic dis-eases. The cost of healthcare for the elderlies is imposing a heavy financial burden both on the elderlies and their fami-lies as well as on society as a whole.