The municipality of shanghai2 ( read Chinese shang-jai: do, pinyin: Shanghii; Mandarin pronunciation: [Aea xaie], Chinese wu Shanghainese: zanhae ) It is the most populous city in China and one of the most populated in the world with more than 20 million habitantes.3 located in East China, Shanghai sits on the Yangtze River delta, centered on the coast of the East China Sea and is managed at the highest level with the category of municipality under central jurisdiction