China Migrant Population Monitoring Survey Data/中国流动人口动态监测调查数据

China Migrants Dynamic Survey (CMDS) is an annual large-scale nationwide sample survey of the migrant population conducted by the National Health Commission since 2009, covering 31 provinces and the Xinjiang Production and Construction Corps. The annual sample size is nearly 200,000 households, covering basic demographic information of the floating population and family members, the scope and trend of mobility, employment and social security, income and expenditure and residence, basic public health services, marriage and family planning services management, children's mobility and education, and psychological culture. It also includes a survey on social integration and mental health of the mobile population, a survey on health and family planning services in outflow areas, and a survey on medical and health services for the mobile elderly.