What are the concepts of first-,second-and third-tier cities?

First-tier cities refer to metropolises that play an important role in national political, economic and other social activities and have the leading role and radiation-driven ability.

Second-tier cities are mostly provincial capitals, economically strong cities in the eastern region or regional central cities with developed economies.

Third-tier cities are large and medium-sized cities with strategic significance, developed economy and large economic aggregate, which are comprehensively evaluated according to many indicators such as city size, population, economic development level and GDP.

There are 338 cities above the prefecture level in China (April 218):

First-tier cities: 4

New first-tier cities: 15

Second-tier cities: 3

Third-tier cities: 7

Fourth-tier cities: 9

Fifth-tier cities: 1.

on the basis of synthesizing these first-hand data, 4 cities are ranked by 1 indicators: the entry density of first-line brands, the number of first-line brands, GDP, per capita income, the number of 211 universities and Fortune Global 5 companies, the ranking of key strategic cities of large companies, airport throughput, the number of embassies and consulates, and the number of international routes.

According to a specific formula, the comprehensive business index of each city is comprehensively calculated. Based on this ranking, 4 cities are completely graded. According to the international understanding, a city in the modern sense is the product of industrial and commercial development, and it is a place where capital, talents, goods and information exchange.

K.J. Barton, a famous British urban economist, defines a city as "a network system in which various economic markets-housing, labor, land, transportation, etc.-are intertwined in a limited space area."

after more than 3 years of reform and opening-up, the development of China city is actually breaking through the shackles of administrative levels and getting closer to the modern commercial-driven city. This breakthrough means that it is possible to classify cities according to the prosperity of industry and commerce, and the necessity is becoming more and more urgent.

based on the latest year's business data of 16 brands, user behavior data of 17 internet companies and big city data of data institutions, CBN New First-tier Cities Research Institute ranked 338 cities above prefecture level in China again.

In p>217, the latest ranking of urban commercial charm followed the five indicators of the previous year, namely, the concentration of commercial resources, urban hub, urban people's activity, lifestyle diversity and future plasticity, but some adjustments were made in the analysis algorithm.

Invite the expert committee of the New First-tier City Research Institute to assign values to the weights of the five indicators, which will be included in the scoring system by expert scoring method; The principal component analysis method is used to objectively weight the data below the secondary index.

Baidu Encyclopedia-third-tier cities

Baidu Encyclopedia-second-tier cities

Baidu Encyclopedia-first-tier cities

Baidu Encyclopedia-new ranking list of Chinese cities.