Shanghai (Chinese: ; Pinyin Shànghai) is one of the largest cities by population in the People's Republic of China, and the world. The city is located in eastern China, at the middle portion of the Chinese coast, and sits at the mouth of the Yangtze River. Due to its rapid growth over the last two decades it has again become a global city, exerting influence over finance, commerce, fashion, technology and culture. Once a fishing and textiles town, Shanghai grew in importance in the 19th century due to its favourable port location and was one of the cities opened to foreign trade by the 1842 Treaty of Nanking. The city then flourished as a centre of commerce between east and west, and became a multinational hub of finance and business in the 1930s. However, with the Communist Party takeover of the mainland in 1949, the city's international influence declined. In 1990, the economic reforms introduced by Deng Xiaoping resulted in an intense re-development of the city, aiding the return