Shanghai, with a population of more than 18 million (and over 5.8 million migrants), is one of the most populous and most developed cities in the People's Republic of China. Shanghai was the largest and most prosperous city in the Far East during the 1930s, and remained the most developed city in Communist China. In the 1990s Shanghai again became an attractive spot for tourists worldwide. Shanghai is a fascinating mix of East and West. It has historic shikumen houses that blended the styles of Chinese houses with European design flair, and it has one of the richest collections of art deco buildings in the world. http://wikitravel.org/en/Shanghai