The overall goal of this survey is to understand and grasp the dynamic situation of elderly people in urban and rural areas of China over time, as well as the new problems encountered by elderly people in the process of modernization. The main contents of the survey include: basic conditions and demographic and sociological characteristics of the elderly, economic support and security, medical and life care, community services, spiritual and cultural needs, mechanisms and forms of participation in social development, grassroots organizations and management. 2. Conduct in-depth analysis on the health status, living support, consumption needs, care services, community construction, home-based elderly care, and the demand for elderly work among the elderly population. 3. Strengthen scientific investigation and research on major issues such as social security for the elderly, legal rights and interests, spiritual and cultural life, participation in social development, and the elderly industry, in close conjunction with national aging work. To formulate aging policies and promote the development of the elderly industry, we will use the latest achievements in basic research fields such as social science, information science, and medical science to vigorously carry out basic theoretical research on aging applications, and provide necessary theoretical reserves for scientific research and innovation in the field of aging. 4. Write special research reports on topics such as elderly economy, elderly healthcare and care, elderly education, elderly spiritual and cultural life, elderly social participation, elderly law, elderly psychology, and the elderly industry. Key comparative studies will be conducted on the issues of elderly people and poverty, population aging and public policies, elderly people and grassroots organizations, social exclusion and social policies of the elderly, political tendencies of the elderly, population aging and social security costs, family elderly care in social wealth redistribution, China's aging policy and sustainable development, promoting intergenerational harmony, the impact of population aging on the aging industry, psychological research on the elderly, safeguarding the legitimate rights and interests of the elderly, elderly participation in social development and elderly social support networks, and community services for the elderly. This survey was conducted within the scope of 20 provinces, autonomous regions, and municipalities directly under the central government nationwide, and the standard time point for the survey was 00:00 on June 1, 2006. The survey subjects are divided into two types, with individual interviewees being Chinese citizens aged 60 and above residing within the territory of the People's Republic of China (excluding Taiwan Province, Hong Kong Special Administrative Region, and Macao Special Administrative Region); The community survey targets elderly related departments or elderly workers at all levels of the city (district, county), street (township, town), neighborhood committee (community, village committee).