Jia Dao, a contemporary poet, went to visit his friend Li Ning, but Li Ning was not at home. Not far from Jia Dao, Wan Li came to Ning and asked him for money. At this time, Jia Dao, as you must have guessed, was extremely depressed, not only angry, but also in danger of begging along the street. Fortunately, Jia Dao is a clever man, and he quickly pieced together some poems. I'm going to find some young artists who have little culture and worship poets to cheat some money. At that time, Jia Dao rode on a donkey and remembered the sentence, "Birds stay in the trees by the pool, and monks push the door under the moon." But I am sad. I want to knock, but I am sad. I made an "interrogation" on the donkey's back and bumped into Jing and Han Yu's guard of honor. When Han Yu asked him why, Jia Dao expressed doubts. Jia Dao said: "As explained in the previous sentence, he just committed lust, caution and bravery under a tree by the pool (see the movie Lust, Caution and Courage by the famous actress Christy Chung for details) and then came back excitedly. In this case, he should push, because he doesn't want to be known by Master that he spends the night outside. " "No, no," said Han Yu. "If he comes back secretly, it will be even more misbehaving and suspicious. Then I found a piece of paper and wrote down the poem, specifically asking Han Yu to note: "Knock here! Han Yu "expressed admiration again, then thanked him and left."

The next day, Jia Dao shouted at the roadside: "Mr. Jing Zhao Yin and Han Yu personally signed it!" Finally, I went home safely. The word "thoughtful" has become a much-told story. Later people call it "thoughtful".