China, home to the world’s second largest rural population, is expected to add close to 300 million more urbanites by 2030.

China, home to the world’s second largest rural population, is expected to add close to 300 million more urbanites by 2030, when Shanghai and Beijing will likely account for two of the world’s Top 5 mega-cities, according to new UN research. “We are observing one of the most significant economic transformations the world has seen: 21st-century China is urbanizing on a scale 100 times that seen in 19th-century Britain and at 10 times the speed,” notes a new McKinsey paper on cities and luxury markets. China’s wealth will be concentrated in these urban areas: Over the next decade, McKinsey expects Beijing, Tianjin, Guangzhou, Chongqing and Shenzhen, in addition to Hong Kong, to join the list of “top luxury cities.”