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淮汝颍地区是指淮河、汝河、颍河交汇地区。其地理范围东到涡河,北及许昌——太康一线,南至大别山脉,西达桐柏、外方诸山。地势西高东低,河谷阶地与冲积平原相间。在它的东面和西面,是一望无际的华北大平原,中间无任何天然屏障;南面是广阔的江淮丘陵,西面经方城缺口、桐柏缺口可进入南阳盆地;西南经“义阳三关”可直达江汉平原。可以说,淮汝颍地区是各大地理区相互辐射的交汇点,是东西南北各大地理区交汇的中心。这种开放的地理格局,为上古时期的文化交流提供了一个理想的地理舞台,而分布于此的古诸侯国又为文化交流起到了重要的中介作用。
Huai Ruying area refers to the Huaihe River, Ruhe, Yinghe intersection area. Its geographical range east to the Edo River, north and Xuchang - Taikang line, south of the Dabie Mountains, west of Tongbai, foreign mountain. The terrain is high in the west and low in the east, and the valley terraces are in phase with the alluvial plain. In its east and west, it is an expanse of the Great North China Plain, with no natural barrier in the middle; the vast Jianghuai hills to the south, the narrow side of Fangchengcheng to the west and the Nanyang basin through the gap of Tongbai; Off "can be directly Jianghan Plain. It can be said that the Huai Rying area is the intersection of major geographical areas that radiate to each other, and is the center where major geographic areas of East, West, South and North meet. This open geographical pattern provides an ideal geographical stage for cultural exchanges in ancient times, and the ancient patriotic states distributed here also play an important mediating role in cultural exchange.