Shanghai is one of the four direct-administered municipalities of the People's Republic of China. The city is located on the southern estuary of the Yangtze River, with the Huangpu River flowing through it. With a population of 24.89 million as of 2021, Shanghai is the most populous urban area in China and among the most populous cities proper in the world. It is the only city in East Asia with a GDP greater than its corresponding capital. 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 (nominal) of nearly 9.1 trillion RMB ($1.33 trillion). Shanghai is divided into 16 county-level districts, including the Pudong district pictured here.Photograph credit: Tony Jin