Introduction to Tree Scratching Rocks: The abrupt rocks beside Yunv River seem to be in danger of falling, but they stand tall and extraordinary. These granite cobblestones, some five or six meters high, and some more than ten or twenty meters high, are mostly cracked in layers, and most of the cracks have one or more roots of tree vines extending into them, looking like a The rattan ropes tied these rocks together intentionally or unintentionally, making the rocks that were about to break and leave their mother body unable to fall off.