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This picture taken on November 27, 2017 shows a woman retrieving abandoned clothing from buildings which were destroyed by the municipality on the outskirts of Beijing. The labour of hundreds of millions of migrants who moved from China's countryside to its cities has fuelled the economic boom in recent decades, though legally they are not allowed access to social services outside their home towns. But authorities in overcrowded Beijing have been getting rid of many of them for the past year as they seek to cap its population at 23 million by 2020 and demolish 40 million square metres of illegal structures. / AFP PHOTO / Fred DUFOUR / TO GO WITH China-migration-social, FOCUS by Becky Davis (Photo credit should read FRED DUFOUR/AFP/Getty Images)

This picture taken on November 27, 2017 shows a woman retrieving abandoned clothing from buildings which were destroyed by the municipality on the outskirts of Beijing. The labour of hundreds of millions of migrants who moved from China's countryside to its cities has fuelled the economic boom in recent decades, though legally they are not allowed access to social services outside their home towns. But authorities in overcrowded Beijing have been getting rid of many of them for the past year as they seek to cap its population at 23 million by 2020 and demolish 40 million square metres of illegal structures. / AFP PHOTO / Fred DUFOUR / TO GO WITH China-migration-social, FOCUS by Becky Davis (Photo credit should read FRED DUFOUR/AFP/Getty Images)
Getty Images

AFP FRED DUFOUR