Yi River is one of the tributaries of Luohe River on the south bank of the Yellow River in China. It originates from Wan Tao Town, Luanchuan County, at the southern foot of Xiong 'er Mountain, flows through Songxian County and Yichuan, meanders at the southern foot of Xiong 'er Mountain and the northern foot of Funiu Mountain, enters Luoyang through Yi Que, flows to Yanshi in the northeast, and joins with Luoshui to form Luo Yi River.

3. The total length is 2,688 kilometers, and the drainage area is 6 100 square kilometers.

4. The Yihe River and the Luohe River have propped up a heavy wing of the Heluo culture, and the "Elo civilization" has been praised by some western historians as "the two rivers civilization in the East".

Longmen Grottoes is a famous world cultural heritage in China, located on both sides of the Yi River.

6. yi river, called Luanshui in ancient times, originated from Zuanling in Sanhe Village, Wantao Town.

7. "Shan Hai Jing" contains: "The mountains full of canals are all water."

8. "Huainanzi" contains: "Yishui comes out of Weishan".

9. Manqu Mountain or Shangwei Mountain are ancient names for drilling ridge.

10. Geography Day: Out of Xiong 'er Mountain.

1 1.20 After the 1950s, geologists conducted many investigations and explorations, and found that the mountain structure and geological features of Mengdun Mountain belong to the Funiu Mountain System, so the so-called "going out of Xiong 'er Mountain" is wrong.

12. The Yi River flows east-west between the northern foot of Funiu Mountain and the southern foot of Xiong 'er Mountain.

13. From the source to Tang Ying Village, Tantou Township, it leaves the country and enters Songxian County, passes through Yichuan, Longmen and Yanshi, and joins the Luohe River in Yangcun Village, Guxian Town, with a total length of 2,688 kilometers and a total drainage area of 6 100 square kilometers.