China to create giga-city of 42 million people

Plan is to allow the cities that ring the Pearl River, including Guanzhou and Donguan to merge into one vast conurbation the size of Wales, with a new network of railways and energy and pollution control infrastructure.

http://www.telegraph.co.uk/news/worldnews/asia/china/8278315/China-to-create-largest-mega-city-in-the-world-with-42-million-people.html