Shanghai instance of national central city
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 ten largest metropolitan economies in the world. Shanghai's six largest industries—retail, finance, IT, real estate, machine manufacturing, and automotive manufacturing—comprise about half the city's GDP. As of 2021, Shanghai had a GDP of ¥4.46 trillion RMB ($1.106 trillion in PPP) that makes up 3.69% of China's GDP, and a GDP per capita of ¥179,907 RMB (US$26,747 in nominal or US$44,576 in PPP) In 2021, the average annual disposable income of Shanghai's residents was ¥78,027 RMB (US$12,287) per capita, while the average annual salary of people employed in urban units in Shanghai was ¥191,844 RMB (US$29,736), making it one of the wealthiest cities in China, but also the most expensive city in mainland China to live in according to a 2017 study by the Economist Intelligence Unit. Since 2018, Shanghai has been hosting the China International Import Expo (CIIE) annually, the world's first import-themed national-level expo.
In 2021, Shanghai was the most expensive city in the world. Shanghai was the 5th wealthiest city in the world, with a total wealth amounts to $1.8 trillion, and Shanghai was ranked fifth-highest in the number of billionaires by Forbes. Shanghai's nominal GDP was projected to reach US$1.3 trillion in 2035 (ranking first in China), making it one of the world's Top 5 major cities in terms of GRP according to a study by Oxford Economics. As of August 2022, Shanghai ranked 5th in the world and 2nd in China (after Beijing) by the largest number of the Fortune Global 500 companies in the world.
type of example of manifestation of representation of