泥岩专三材料

Xiaojiazhuang, the small village that gave Ji Feng the deepest memory, is located about ten miles north of Manshi County. From the county seat to Xiaojiazhuang, you have to pass a large embankment. In ancient times, this was the old course of the Yellow River, and the river started from The Yellow River flows here, but over the next few hundred years, the Yellow River changed its course several times, and this became the old course of the Yellow River....