Grassland introduction: There is a 60,000-square-meter grassland in the Zhigengjian Scenic Area of ​​Cao Zhi Nitan. It shows that the Red Army set out from Maoergai in order to avoid the heavy guard of Songpan. After five or six days of arduous trek, it crossed Zongheng 600 miles of water and grassland, reaching Banyou and Brazil areas. On the vast water grassland, there are three roads to experience the grassland. Tourists can pass through the grassland smoothly along the "no surprises" road with the red flag of the vanguard; they can also experience "surprises and surprises" along the low-lying and wet paths. There is a "risk-free" process of crossing the grass; you can also take a "thrilling and dangerous" grass path where you may step into the swamp and sink deeper and deeper if you are not careful.