학위논문 (석사) -- 서울대학교 대학원 : 사회과학대학 사회복지학과, 2020. 8. 하정화.With the increased life expectancy of the elderly in China, the country has gradually entered an aging society in 2000. In old age, the elderly gradually drop out of the labor market, and various social resources are lost. The cognitive functioning of the elderly shows progressive cognitive impairment or decline with age, along with changes in the above factors. In old age, if cognitive impairment is serious, daily living ability and the ability to take care of oneself cannot be realized. Activity theory requires the elderly to actively participate in social activities to maintain their social networks, and thus, preserve good mental health and physiological functioning. Although some ex...