11/09/2017
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Migrant children: Migrant children refers to those members of the migrant population who are aged 0-17 years. The migrant population refers to persons whose place of residence is different from the location (e.g. town/township or street committee) of their household registration (hukou), and who have left the location of their household registration for more than six months. It excludes the population whose current place of residence is different from that of their hukou registration, but is within the same city-level administration.
Left-behind children: Left-behind children refer to children who live in their original domicile, but do not live together with their parents, as either one parent or both parents have migrated. Rural left-behind children refer to left-behind children whose household registration locations are in rural areas.
Poverty-stricken area: Poverty-stricken areas include the original 592 “key poverty counties” identified by the Government of China for focused poverty alleviation efforts, and the 680 counties that form the 14 "poverty blocks" (11 blocks, along with the Tibet Autonomous Region, ethnically Tibetan regions in four provinces, and South Xinjiang), as defined in the new Outline for Development-oriented Poverty Reduction for China's Rural Areas (2011-2020). There is an overlap of 440 counties between the list of “key poverty counties,” and the updated “poverty blocks.” Therefore, there are 832 distinct counties categorized as “poverty-stricken areas” for this factsheet.
Sex ratio: Sex ratio refers to the ratio of males to females in the population, and is an important indicator of sex composition. It is usually expressed as the number of males corresponding to every 100 females.
Sex ratio at birth: Sex ratio at birth refers to the number of live male births corresponding to every 100 live female births. In the absence of intervention, sex ratio at birth usually lies between 103 and 107.
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