Introduction to Dingjianyan: Dingjianyan is located on the west cliff of Changshanba. It is inserted horizontally and forms a T-shape with the stream. There is a flower stone pile on the clear wall of the sky, like a broken sword, inserted in the cliff. In the middle of the cliff, the carved patterns on the sword hilt and the lingering cherry blossoms are clearly visible. The stone pile is also called King Zhao's Sword. Legend has it that King Zhao failed to kill the turtle, and the turtle became angry and used the turtle shell to throw the sword into the sky.