"Urban agglomerations" (City Circle) in mainland China since the 1990s the common geographical and economic terms, the Chinese mainland, there are four main urban agglomerations. The analysis shows that four urban agglomerations and central city status.

"Urban Clusters" (city) in mainland China since 1990s and beyond the geographical economic terms commonly used in mainland China there are 4 major cities. This article on 4 major cities and urban centers in the State.

“The urban cluster” (city circle) will be mainland China area from 1990 ages later the commonly used region economical terminology, mainland China mainly has four big urban clusters.This article carries on analysis showing on four big urban clusters and the key city conditions.

"Urban agglomeration" (cities) in the Mainland of China since 1990, common regional economic terms, there are four major cities in mainland China. This analysis shows the status of the four urban agglomeration and the central city.

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