Research by Yi Fuxian, a demographer at the University of Wisconsin–Madison, suggests that China's actual population may be close to 1.27 billion, with the officially announced figure of 1.4 billion overstated by 130 million.
On October 13, The Wall Street Journal published a report citing research by Yi Fuxian, a scholar at the University of Wisconsin–Madison, saying that China's actual population may be around 1.27 billion, about 130 million fewer than the officially announced 1.4 billion, based on evidence including vaccine dosages, census data, and discrepancies in school-age population records, and noting that overestimating the population could exacerbate strategic miscalculations between China and the United States.
In 2007, demographer Yi Fuxian published Big Country, Empty Nest, arguing that China's population data was falsified and that family planning should be abolished; he was subsequently banned and went into exile overseas.