and is divided into 16 county-level districts. Although every district has its own urban core, the city hall and major administrative units are located in Huangpu District, which also serves as a commercial area, including the famous Nanjing Road. Other major commercial areas include Xintiandi and Huaihai Road in Huangpu District, and Xujiahui in Xuhui District. Many universities in Shanghai are located in residential areas in Yangpu District and Putuo District. Seven of the districts govern Puxi ( "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 () or the core city (), which comprise Huangpu, Xuhui, Changning, Jing'an, Putuo, Hongkou, and Yangpu. Pudong ( "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 (). 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. , 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. Economy Shanghai has been described as the "showpiece" of the booming economy of China. The city is a global center for finance and innovation, and a national center for commerce, trade, and transportation, with the world's busiest container port—the Port of Shanghai. As of 2018, the Greater Shanghai metropolitan area, which includes Suzhou, Wuxi, Nantong, Ningbo, Jiaxing, Zhoushan, and Huzhou, was estimated to produce a gross metropolitan product of nearly 9.1 trillion RMB ($1.33 trillion in nominal or $2.08 trillion in PPP), exceeding that of Mexico with GDP (nominal) of $1.22 trillion, the 15th largest in the world. As of 2020, the economy of Shanghai was estimated to be $1 trillion (PPP), ranking the most productive metro area of China and among the top