Its basic special organiccharacter is chain embedded structure of three cities? economic zones. However, atpresent, it is only existing in the form of suppositional chain.

• 初步认为，这一带状城镇群是以三个城市经济区的链环式嵌套结构构成城镇群基本的空间组合特征，但目前这一嵌套结构只是以虚链环式的形式存在。