How did "Guapiao Cliff" and "Hill Spring" get their names?

"Zhuangzi" wrote: "Yao let the world, and Xu You fled to Jishan to wash his ears." There are also "Guapiao Cliff" and "Hill Spring".

It is said that Dayao discussed Zen with Xu You when he was feeding cattle water under the mountain spring. When Xu You heard about it, he immediately hung the gourd ladle for drinking cow water on the cliff and washed his ears with cow water to show foul language. Later, he escaped into the depths of the forest. This matter is well known at the foot of Songshan Mountain.