The detailed story comes from one of the most famous poems of Sichuan, a famous poet in Tang Dynasty.

Birds stay in the trees by the pool, and monks knock at the door under the moon.

Jia Dao (779 ~ 843), a poet in the Tang Dynasty, was made a poetry slave. Han nationality, a native of Fanyang County (now Zhuozhou City, Hebei Province), Youzhou County, Hebei Province in the Tang Dynasty. He became a monk in his early years and had no name. Self-named "Jieshishan people". It is said that when he was in Chang 'an (now Xi 'an, Shaanxi), Jia Dao complained about writing poems because there was an order forbidding monks to go out in the afternoon, and Han Yu discovered his talent and became a "poet". Later, he was taught by Han Yu to take the imperial examination, but failed to win the first place. Tang Wenzong was excluded and demoted as the main book of the Yangtze River (now Pengxi County, Sichuan Province). At the beginning of Huichang, Tang Wuzong was transferred from Sicang, Zhou Pu to a family, but he didn't die of illness.

Study the origin carefully

One day, Jia Dao visited a friend named Li Ning on the outskirts of Chang 'an. He searched along the mountain road for a long time before he touched Li Ning's home. At this time, the night is quiet and the moonlight is bright. His knock on the door woke up the birds in the tree. Unfortunately, Li Ning was not at home that day, and Jia Dao left a poem:

Li Ning's Seclusion

Living leisurely here, few neighbors come, and the overgrown path leads to the wilderness.

Birds are freely perched in the trees by the pool, and monks are knocking at the door.

Walking across this bridge, you can see the charming scenery of Ye Yuan, and the feet of clouds seem to be moving on the floating rocks.

I will leave here for a while, but I will come back and retire with my friends on the appointed date.

The next day, Jia Dao rode a donkey back to Chang 'an. On the way, he remembered the poem that he improvised last night, and thought that the word "knock" in "Birds on the trees by the pool, Monks knocking at the door under the moon" was not appropriate enough, and it might be more appropriate to use the word "push" instead. Jia Dao rode on a donkey, sang songs, knocked at the door and pushed the door, and unconsciously entered Chang 'an. People in the street are amused to see him like this. At this time, Han Yu, who was an official in Beijing, came face to face with the honor guard. Pedestrians and vehicles gave way, and Jia Dao rode a donkey with lively gesticulations and broke into the guard of honor. Send someone to take him to see Han Yu.

Han Yu asked Jia Dao why he trespassed. Jia Dao read the poem he wrote to Han Yu, but he couldn't make up his mind whether to use "push" or "knock" in a sentence. Han Yu listened and thought with great interest. After a while, he said to Jia Dao, "I think it's better to knock at the door. If the door is closed, how can you push it open? Besides, it is polite to knock on other people's doors at night! In addition, the word "knock" adds a little more noise in the dead of night. There is movement in the silence, is it not lively? " Jia Dao listened to nodding. Not only did he not get punished this time, but he also made friends with Han Yu.

Since then, deliberation has become a popular word, which means that when making an essay, writing a poem or doing something, you have to ponder and consider it repeatedly to get the best result.