Introduction to the Ergun River: The Ergun River originates from the western slope of the Greater Khingan Mountains and is a tributary of Heilongjiang. It takes the Hailar River as its source and has a total length of 1,620 kilometers. The river's terrain is flat, its valley is wide, its water flow is steady, and it is a good navigable channel. The river bank area has fertile land and abundant water and grass, making it an ideal place for human beings to live.