The sex ratio of the different administrative divisions of China has been the subject of academic study because of a high imbalance in births since the 1990s and female infanticide further worsening the imbalanced sex ratios at birth.
The figures are from the 2000 census, intercensus survey of 2005 (which was carried out in November 2005 on a representative 1% of the total population), 2010 census, and 2020 census.
Figures for Hong Kong are from the 2001 census, 2011 census, and the 2021 census conducted separately by Census and Statistics Department of Hong Kong.