Whatever else this might be, it’s big.
For decades, China’s government has tried to limit the size of Beijing, the capital, through draconian residency permits. Now, the government has embarked on an ambitious plan to make Beijing the center of a new supercity of 130 million people. […] The planned megalopolis, a metropolitan area that would be about six times the size of New York’s, is meant to revamp northern China’s economy and become a laboratory for modern urban growth. […] “The supercity is the vanguard of economic reform,” said Liu Gang, a professor at Nankai University in Tianjin who advises local governments on regional development. “It reflects the senior leadership’s views on the need for integration, innovation and environmental protection.” […] The new region will link the research facilities and creative culture of Beijing with the economic muscle of the port city of Tianjin and the hinterlands of Hebei Province, forcing areas that have never cooperated to work together.
The integrated ‘supercity’ would have a population larger than Japan’s (and larger than all but eight countries in the world, excluding China itself).