Map of the situation in ancient China
In ancient China, the Luoyang Basin was the center, the west was connected to the Guanzhong Plain through the Hangu Pass and the Tongguan Ancient Road, the east was the Hugao Pass to connect the Central Plains and the North China Plain, the south was connected to the Nanyang Basin through Yiqu Pass, the north was connected to the North China Plain through Mengjindu, the north was the Loess Plateau and the Great Wall, the south was qinling, connected to Hanzhong through the four roads (Shu Dao), and the east was connected to the Luoyang Basin by the Hangu Pass and the Tongguan Ancient Road. It also looks at the Yellow River (Several Ferries such as Fenglingdu) in the Jinzhong Basin, the Hexi Corridor in the west; the Wuguan Pass connecting with the Funiu Mountains in the southwest through the Qinling Mountains and the Nanyang Basin; the Guanzhong Plain has four passes to guard (Xiaoguan, Dashanguan, Tongguan, and Wuguan); the Nanyang Basin is Luoyang to the north, the North China Plain to the east, Xiangyang to the south is the Jianghan Plain in the south, the Daba Mountain to the west, and the Guanzhong Plain to the northwest is the Guanzhong Plain.
The three places of Luoyang Basin, Guanzhong Plain, and Nanyang Basin and the connecting passage between them are distributed in a triangular manner; the Guanzhong Plain can be attacked and defended, and when it is strong, it can take the river in the west to control the nomadic peoples, and when it is strong, it will take the nomadic people in the west, and take the Bashu in the south, draw fresh blood for the hegemony (the country of Tianfu irrigated by Dujiangyan), prepare for the southeast to take the Nanyang Basin to the south, and take Luoyang in the east to spy on the Central Plains; rely on the shrinking development of the Four Passes to shrink and lick the wounds when it is weak; after taking the world, the Guanzhong Plain will take Luoyang as the eye and monitor the world (Central Plains region) During the Western Zhou Dynasty, there were the Sixth Division of Zong Zhou Hao and the Eighth Division of Luoyang of Chengzhou, and the Sui and Tang Dynasties were also the eastern and western capitals of Xi'an Luoyang. Although the Luoyang Basin is the center of the world, the territory is too small and the foundation is insufficient, and it must be backed by the Guanzhong Plain, otherwise it is a rootless duckweed. The Nanyang Basin and Xiangyang are the only way to the south and are the forward bases for unifying the south. If a ruler takes these three places, he is not far from unifying the world. I don't know how many emperors will repeatedly compete for these three places and bury their bones in other places. The struggle for hegemony and unification of the Central Plains Dynasty was almost always carried out around these places, or began with these places as the foundation. History is that many of the causes of emperors and kings began in these three places. For example, the great deeds of Zhou, Qin, Han and Tang.
These three places are the abbreviated history of the Central Plains Dynasty in China, which has written the 5,000-year history of the Chinese nation.
Luoyang, Guanzhong, Nanyang Triangle
Actual distribution map of Guanzhong, Nanyang and Luoyang triangles
(Figure 3 comes from the Internet, if there is infringement, please contact)