In ancient times, it refers to the Central Plains, the birthplace of the Chinese nation and civilization, and the regional concept centered on the middle and lower reaches of the Yellow River, which means within the country and between heaven and earth. According to the concepts of astronomy, geography and geomantic omen, the ancestors of the Chinese nation believed that Dengfeng, Henan Province, located at the foot of Songshan Mountain in Zhongyue, was in the middle of the world. In the Central Plains, the left is Qinglong, which is located in the south of Qianli Taihang Mountain, the right is Baihu, and the Qianli Funiu Mountain Range, Tongbai Mountain Range and Dabie Mountain Range are on the north, followed by the towering Tianshan Mountain, Kunlun Mountain and Qinling Dragon Body in the west. The ancestor of Wanshan Mountain, Zhongyue Songshan Mountain, is the Long Mai in the east, and the Yellow River Luoshui is the world-famous two-river basin, which is the center of Chinese national activities. Dengfeng, known as Yangcheng and Yuzhou in ancient times, Yang Zhai, Xiayi and Yanshi in ancient times, is also the earliest place where the Chinese nation and the Chinese ethnic group have lived, lived, multiplied and made their capital since 5, years of history, culture and civilization.