The Chinese Social Survey (CSS Project) is a nationwide large-scale continuous sample survey project initiated by the Institute of Sociology of the Chinese Academy of Social Sciences in 2005. The center is responsible for the nuclear map sampling and household survey work in Inner Mongolia Autonomous Region and Jiangsu Province. It has completed the nuclear map and household list list of 12 districts and counties and 48 villages in the two provinces, as well as 48 village resident questionnaires and 816 households. The interview work of the household questionnaire.