Danxia introduction: The exposed strata are all Jurassic and Cretaceous river-lacustrine red sedimentary rocks. This special landform has formed countless strange Danxia landforms such as pagoda-shaped, castle-shaped, needle-shaped, columnar, rod-shaped, square mountain-shaped, and peak forest-shaped under the combined physical and biochemical effects of differential weathering, gravity collapse, wind and rain dissolution, etc. landscape.