据麦肯锡公司研究报告的统计结果，每年新涌入的城镇居民高达1，500－2，000万，这意味着到2030年中国大城市（人口至少在百万以上）需要从2010年的125座增加到2030年的220座以上。
According to research by McKinsey & Company, with the annual influx of new urban residents totaling 15-20 million, China will need more than 220 large cities (at least one million people) by 2030, up from 125 in 2010.