“环首都贫困带”是围绕首都形成的贫困区域，该区域的发展状态与首都形成了巨大反差，这种状况是由首都和环首都区域之间不对称发展所造成的。环京津的京南地区是环首都地区的重要区域，为了让该地区得到迅速发展，必须顺次经过“丁”、“工”、“王”的空间构造步骤，最终打造成为“田”字型城市发展格局。在充分考虑自然垄断、行政干预等多种区域因素的情况下，应分四个层次使京南城市群得到发展，北京、天津是第一层次，保定、廊坊是第二层次，核心县级市是第三层次，普通县与镇是第四层次。这样就能够使京南城市群在最大程度上得到整合，达到以强带弱的目的。环首都的京南地区由此也就从“服务京津”变为“对接京津”，从而逐渐培育起自身的经济增长点。%“Poor belt around the capital city”(PB) refers to the poor areas around the capital city, and thus the huge contrast is formed between the development status of PB and the capital city. This situation is caused by the unbalanced development between PB and the capital. Jingnan area around Jingjin is an important area around the capital. In order to achieve rapid development in this area,“Ding(丁)”,“Gong (工)”and“Wang (王)”shape spatial frames must be developed step by step. Finally,“Tian(田)”shape spatial frame must be realized. In consideration of various regional factors such as natural monopoly and administrative intervention, the area of Jingnan will be divided into four levels to realize urban agglomeration development. Beijing and Tianjin are the first level;Baoding and Langfang are the second level;core counties is the third level;ordinary counties and towns are the fourth level. In this way, Jingnan urban agglomeration can be developed into the integration at the most extent to achieve the purpose of the weaker being helped by the stronger. The developing pattern for Jingnan area can be changed from serving Jingjin to docking Jingjin, and the economic growths point in this area can be developed as well.
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