In the Ming Dynasty, the poem "Dragon Slaughter" said, "thousands of feet's beam has low water pressure, and its back reaches the bottom of the stream."
Yun Zheyue, the sky is full of fun.
Thousands of feet beam water pressure, canoe lie on your back, people return to the stream.
There is spring water in the cave. I want to find the source of the spring water and lie on the boat.
It rained heavily on the mountain and it was cold in the cave.
This is a sentence and idiom to describe Shuanglong Cave.