Introduction to the Halaha River: "Halaha" means "barrier" in Mongolian. Since the west bank is higher than the east bank, from the east bank of the river, the west bank looks like a long barrier in front of you. Hahe River got its name from this landform. The river is the boundary river between China and Mongolia. It originates from Songye Lake (Dalbin Lake) on the north slope of Motian Ridge on the west side of Daxingan Mountains. It flows through Dujuan Lake and also collects in tributaries such as Suhu River and Gurban River. The main stream is It flows into Mongolia from east to west through Ershi Town and belongs to the Ergun River System. The average water depth is 2 meters, the total length is 399 kilometers, the internal flow length is 136 kilometers, and the drainage area in our country is 7520 square kilometers. More than 10 kilometers upstream is an underground river, flowing under the stone pond forest. You can only hear the gurgling water, but no trace of the river water. The river flows from east to west, and after flowing into Beir Lake in Mongolia, it turns back and flows into Hulun Lake, so people call this river the "Patriotic River". The banks of the Halaha River are covered with primitive plant communities, and the meandering river is hidden among the mountains. Hanoi is rich in many kinds of precious and rare cold-water fish. Among them, the huge Zheluo fish swims upstream in groups every year in the peach blossom water. It has long been famous for its fresh and tender meat. In the middle and lower reaches of the Halaha River, you can also take a raft to float along the river to fully appreciate the beauty of nature.