Sandstone is a natural stone, but also a natural anti-skid material. The rocks were decomposed by weathering and denudation, or dissolved by water erosion, deposited on the stone bed. Due to crustal movement, the pressure cementation, and a series of physical and chemical effects, so that the formation of Now the sandstone mine. Its unique texture, the formation of streamlined stripes. Texture changes, patterns clear, elegant colors, like the Yellow River turbidity, rolling waves; Another example is the Millennium trees, circle rings; like a picture of landscapes into the painting. Elegant and warm, coordinated and yet luxurious; it has a stone texture, wood texture, as well as spectacular landscape picture, rich colors, close to nature, simple and elegant, unique in the many stone, it is beautiful Was called "Li Shi."