以上海为中心的长江三角洲经济圈、以广州、深圳为中心的珠江三角洲经济圈和以北京、天津为中心的京津冀经济圈,是我国经济最具竞争力和活力的三个地区。2003年各经济圈的发展继续呈快速增长态势。一、三大都市经济圈总量约占全国的1/3,长江三角洲总量最大、单位国土面积产出最 The Yangtze River Delta economic zone centered on Shanghai, the Pearl River Delta economic zone centered around Guangzhou and Shenzhen, and the Beijing-Tianjin-Hebei Economic Circle centered around Beijing and Tianjin are the three most economically competitive and dynamic areas in our country. The development of all economic circles in 2003 continued its rapid growth. One, three major metropolitan economic circle total about 1/3 of the country, the largest total amount of the Yangtze River Delta, the unit area of ​​land output