Introduction to Chishi Tower: Dongyan (Chishi Tower) is more than 60 meters high, with steep sides and standing like a drum. Because the rock wall is red, it is also called Chishi Tower. The only way to get to the top of the Chishi Tower is to stand close to the cliff, step on the slope with your feet, climb the tunnel with your hands, rotate between the cracks in the rocks, and pass through the two "Tianmen" to reach it.