Shanghai contains the administrative territorial entity Pudong
Shanghai (; Chinese: 上海, Shanghainese: Zaon6he5 [zɑ̃̀.hɛ́] (listen), Standard Mandarin pronunciation: [ʂâŋ.xàɪ] (listen)) is one of the four direct-administered municipalities of the People's Republic of China (PRC). The city is located on the southern estuary of the Yangtze River, with the Huangpu River flowing through it. The population of the city proper is the third most populous in the world, with 24.89 million inhabitants in 2021, while the urban area is the most populous in China, with 39,300,000 residents. As of 2018, the Greater Shanghai metropolitan area was estimated to produce a gross metropolitan product (nominal) of nearly 9.1 trillion RMB ($1.33 trillion). Shanghai is one of the world's major centers for finance, business and economics, research, science and technology, manufacturing, transportation, tourism, and culture, and the Port of Shanghai is the world's busiest container port.
Originally a fishing village and market town, Shanghai grew in importance in the 19th century due to both domestic and foreign trade and its favorable port location. The city was one of five treaty ports forced to open to European trade after the First Opium War. The Shanghai International Settlement and the French Concession were subsequently established. The city then flourished, becoming a primary commercial and financial hub of Asia in the 1930s. During the Second Sino-Japanese War, the city was the site of the major Battle of Shanghai. After the war, with the CCP takeover of the mainland in 1949, trade was limited to other socialist countries and the city's global influence declined.
By the 1990s, economic reforms introduced by Deng Xiaoping a decade earlier resulted in an intense redevelopment of the city, especially the Pudong New Area, aiding the return of finance and foreign investment. The city has since re-emerged as a hub for international trade and finance; it is the home of the Shanghai Stock Exchange, one of the largest stock exchanges in the world by market capitalization and the Shanghai Free-Trade Zone, the first free-trade zone in mainland China. Shanghai has been classified as an Alpha+ (global first-tier) city by the Globalization and World Cities Research Network. As of 2022, it is home to 12 companies of the Fortune Global 500 and is ranked 4th on the Global Financial Centres Index. The city is also a center for research and development and home to many highly ranked Double First-Class Universities. The Shanghai Metro, first opened in 1993, is the largest metro network in the world by route length. 
Shanghai has been described as the "showpiece" of the booming economy of China. Featuring several architectural styles such as Art Deco and shikumen, the city is renowned for its Lujiazui skyline, museums and historic buildings including the City God Temple, Yu Garden, the China Pavilion and buildings along the Bund, which includes Oriental Pearl TV Tower. Shanghai is also known for its sugary cuisine, distinctive local language and vibrant international flair.Geography
Shanghai is located on the Yangtze Estuary of China's east coast, with the Yangtze River to the north and Hangzhou Bay to the south, with the East China Sea to the east.  The land is formed by the Yangtze's natural deposition and modern land reclamation projects. As such, it has sandy soil, and skyscrapers have to be built with deep concrete piles to avoid sinking into the soft ground. The provincial-level Municipality of Shanghai administers both the estuary and many of its surrounding islands. It borders the provinces of Zhejiang to the south and Jiangsu to the west and north. The municipality's northernmost point is on Chongming Island, which is the second-largest island in mainland China after its expansion during the 20th century. It does not administratively include an exclave of Jiangsu on northern Chongming or the two islands forming Shanghai's Yangshan Port, which are parts of Zhejiang's Shengsi County.
Shanghai is located on an alluvial plain. As such, the vast majority of its 6,340.5 km2 (2,448.1 sq mi) land area is flat, with an average elevation of 4 m (13 ft). Tidal flat ecosystems exist around the estuary, however, they have long been reclaimed for agricultural purposes. The city's few hills, such as She Shan, lie to the southwest, and its highest point is the peak of Dajinshan Island (103 m or 338 ft) in Hangzhou Bay. Shanghai has many rivers, canals, streams, and lakes, and it is known for its rich water resources as part of the Lake Tai drainage basin.Downtown Shanghai is bisected by the Huangpu River, a man-made tributary of the Yangtze created by order of Lord Chunshen during the Warring States period. The historic center of the city was located on the west bank of the Huangpu (Puxi), near the mouth of Suzhou Creek, connecting it with Lake Tai and the Grand Canal. The central financial district, Lujiazui, has been established on the east bank of the Huangpu (Pudong). Along Shanghai's eastern shore, the destruction of local wetlands due to the construction of Pudong International Airport has been partially offset by the protection and expansion of a nearby shoal, Jiuduansha, as a nature preserve.Seven of the districts govern Puxi (lit. "The West Bank", or "West of the River Pu"), the older part of urban Shanghai on the west bank of the Huangpu River. These seven districts are collectively referred to as Shanghai Proper (上海市区) or the core city (市中心), which comprise Huangpu, Xuhui, Changning, Jing'an, Putuo, Hongkou, and Yangpu.
Pudong (lit. "The East Bank", or "East of the River Pu"), the newer part of urban and suburban Shanghai on the east bank of the Huangpu River, is governed by Pudong New Area (浦东新区).Seven of the districts govern suburbs, satellite towns, and rural areas farther away from the urban core: Baoshan, Minhang, Jiading, Jinshan, Songjiang, Qingpu, and Fengxian.Chongming District comprises the islands of Changxing and Hengsha and most—but not all—of Chongming Island.
The former district of Nanhui was absorbed into Pudong District in 2009. In 2011, Luwan District merged with Huangpu District. As of 2015, these county-level divisions are further divided into the following 210 township-level divisions: 109 towns, 2 townships, and 99 subdistricts. Those are in turn divided into the following village-level divisions: 3,661 neighborhood committees and 1,704 village committees.There is a sizable Korean community of Shanghai and Japanese community of Shanghai largely in the Minhang District.
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