Where is the Han boundary of Chu River in history?

The remains of Chu-Han boundary in Xingyang City, Zhengzhou City, Henan Province, are historical allusions in the period of Chu-Han hegemony after the demise of the Qin Dynasty. Chu and Han fought in Xingyang for four years, and then agreed to divide the world by the gap. "The gap in the west is Han, and the gap in the east is Chu." Xingyang City is located in the middle of Henan Province, with a total area of 943 square kilometers.

Xingyang is bordered by Zhongyuan District of Zhengzhou City in the east, gongyi city in the west, xinmi city in the south by Songshan remnant vein, Wuzhi County and wen county across the Yellow River in the north, with a width of 27.6 kilometers from east to west and the strongest point of 45.5 kilometers from north to south. There are six rivers in the territory: Yellow River, Suo River, Yi River, Ku River, Jiayu River and Xushui River.

Xingyang has a continental monsoon climate, a warm zone, four distinct seasons, each with its own characteristics, and a dry spring breeze; Summer is hot and rainy, and water and heat coexist; Autumn is crisp, sunny and occasionally rainy; Winter is cold and dry, with more wind and less snow.

The soil in Xingyang city is divided into brown soil, cinnamon soil and fluvo-aquic soil, which belong to 8 subtypes, 26 soil genera and 85 soil species. Brown soil is distributed in Zhongshan Mountain with an altitude of more than 800 meters and a slope of more than 30 degrees. The mountains are steep, there are many fault cliffs, the climate is humid, and the vegetation types are diverse, mainly deciduous broad-leaved forest.