5. Paris: 691 billion US dollars

Paris is the largest city in France and the second largest city in Europe, second only to London. Paris is the economic and financial center of France, in politics, Technology, culture, education, fashion, art, entertainment, media and other fields have an important influence on the world. Paris is also recognized as one of the four largest cities in the world, along with New York, London and Tokyo. Paris’ GDP is $691 billion.

4. London: US$730.3 billion

The British capital city of London can be divided into West London, East London, South End and Port. The city of London is the center of financial capital and trade. West London is the seat of the British King, the Prime Minister's official residence, parliament and government ministries. East London is an industrial area and workers' residential area. The South District is a mixed industrial, commercial and residential area. The port refers to the Tower Bridge in London. The area between the estuaries of the River Thames. The entire city of Greater London covers an area of ??1,580 square kilometers. London's population in 2001 was 7.188 million. London is the world's largest international foreign exchange market and international insurance center, and one of the world's largest financial and trade centers.

3. Los Angeles: 1.8768 trillion U.S. dollars

Los Angeles has a total area of ??10,567 square kilometers and has become the largest base for the petrochemical, marine, aerospace industry and electronics industries in the United States. It is one of the major centers of science and technology in the United States. It has the largest number of scientists and engineering technicians in the United States. It enjoys the title of "Technology City" and the famous Silicon Valley is located here. In recent years, Los Angeles' financial industry and Business has also developed rapidly. Hundreds of banks have offices in Los Angeles, including many famous international consortiums, such as Lockheed, Northrop, Rockwell, etc. Los Angeles has become a financial center second only to New York. , Los Angeles’ total GDP is US$1.8768 trillion, ranking third among the richest cities in the world

2. New York: US$2.7165 trillion

New York is the first in the United States. A metropolis and the largest commercial port, it is not only the financial center of the United States, but also one of the financial centers of the world. New York is located at the mouth of the Hudson River in southeastern New York State, on the edge of the Atlantic Ocean. It consists of five districts: Manhattan, Brooklyn, and New York. The Bronx, Queens and Richmond cover an area of ??780 square kilometers. The urban population is more than 7 million. The population of Greater New York City, including the suburbs, is 18 million. The total GDP of New York is US$271.65 million, making it the richest city in the world.

1. The richest city in the world: Tokyo, Japan

Tokyo is the largest city in Asia and the second largest city in the world, with a population of nearly 13 million. The capital of Japan is also one of the most populous cities in the world. Tokyo has become the richest city in the world with a GDP of 3.195 trillion. It can also be seen that the capital of Japan is a modern metropolis with a high degree of integration of economy and high technology. The total GDP is about 5 trillion U.S. dollars, and Tokyo’s GDP accounts for about 60% of Japan’s total GDP. Japan also has five major cities in Japan: Osaka/Kobe, Kyoto, Yokohama, Nagomon, and Kitakyushu. Its GDP reaches 4.32 trillion US dollars, accounting for more than 86% of Japan's total. This means that Japan's economic development is highly concentrated in the six major cities. Such a high degree of concentration is not conducive to the development of national security.