Introduction to Dabusu National Nature Reserve: Dabusu National Nature Reserve is located in the center of the western subsidence zone of Songliao Plain, 42 kilometers away from the county seat. Among them, the core area covers an area of ​​3,800 hectares, the buffer area covers an area of ​​4,400 hectares, and the experimental area covers an area of ​​2,800 hectares. There is a kind of thin mud pit in the grass of Dabusu, which the locals call the "Dajiang Jar". It is more than 30 meters away and still has no bottom. No matter humans or animals, if they stray into it, it will be difficult to extricate themselves. If you don't know the method of liberation and there is no one to rescue you, you will be in danger of being destroyed.