A thousand-year-old tree makes clothes hangers and the Yangtze River makes bathtubs. What do you mean?

This is a neat couplet, which can be understood literally, but it has no practical significance. Its origin is as follows: Jie Jin, a gifted scholar in the Ming Dynasty, went to the Yangtze River to take a bath with his father when he was young. At that time, his father intended to test him, so he took off his coat and hung his clothes on an ancient tree by the river, saying that "a thousand-year-old tree is a hanger." Although Jie Jin is very young, he is very clever. He immediately jumped into the river and returned to the bottom line "Wanli Yangtze River as a bathtub".