The story of the ancients considers the words of ancient poetry.

When Jia Dao took the imperial examination for the first time in Beijing, one day he thought of two poems on the donkey's back: "The bird is staying in the tree by the pool, and the monk is knocking at the door on the moon." At first I wanted to use the word "push" and "knock". I thought about it, recited it on the donkey's back, and reached out and made a push and knock gesture. Everyone who saw it was surprised. At that time, Han Yu temporarily acted as the governor of chariots and horses. Jia Dao unconsciously collided with Han Yu's guard of honor and kept making gestures of examination, so he was pushed to Han Yu by Han Yu's attendants. Jia Dao answered in detail what he was thinking, and was not sure whether to use the word "push" or "knock". He was so lost in thought that he forgot to avoid it. Han Yu stopped the carriage and thought for a long time. He said to Jia Dao: "It is good to use the word' knock'." So they rode horses and donkeys home side by side and talked about the methods of writing poems together. They were reluctant to part for several days, so Han Yu and Jia Dao became good friends.