"Children can teach" means that children can teach and young people can cultivate. Later, young people were described as promising and could be made.

Sean was a native of the late Qin Dynasty. Because the assassination of Qin Shihuang failed, he fled to Xiapi to hide.

One day, Sean met an old man in rags on a bridge. When the old man saw Sean, he threw his shoes under the bridge and said to Sean, "Young man, go down and help me pick them up." Sean got off the bridge and picked up his shoes. The old man said, "Put it on for me." Sean knelt on the ground and put on his shoes. The old man smiled and walked away. He walked a long way and came back to Sean and said, "You young man can teach! See you on the bridge in the morning in five days. "

Five days later, early in the morning, Sean came to the bridge, but the old man had already arrived first. He blamed Sean for coming late and told him to come back in five days. The second time, the chicken named Sean rushed to the bridge, but the old man arrived first. This time the old man lost his temper and told him to come back in five days. This time, Sean came in the middle of the night, waited for a while, and the old talent came back. The old man was very happy. He gave Sean a book and told him that it was very useful to read it. When Sean came home, he found it was a book about the art of war. He studied day and night, and later helped Liu Bang to make suggestions and unify the world. (from historical records? The 25th Family ")

The idiom related to Xiao He is "Success is also Xiao He, and failure is also me".

Xiao He, prime minister of Liu Bang, Emperor Gaozu. Success is due to Xiao He, and failure is also due to Xiao He. To make a metaphor, the success or failure of things is caused by this one person.

Use law as object and clause; It means that success or failure depends on one person.

In classical Chinese, Han Xin was accused of rebellion and summoned him in advance, fearing that he would not obey, but conspired with the petty criminals. People were tricked into saying that Chen Yi was broken. He said,' Although he is ill, he will be congratulated.' If you believe it, you will be punished. The letter was recommended by General Xiao He. Now that he is dead, he has a plan. Therefore, slang has the expression' success is also Xiao He, failure is also Xiao He'.

The idiom related to Cao Can is "following the rules".

Cao Can was the founding hero of the Han Dynasty. He and his comrades-in-arms, Han Xin, Sean and Xiao He, closely United around Tingchang and Surabaya rogue Liu Bang, laying a great foundation for the Han Dynasty. When Cao Can was a prodigal son, he had a good relationship with Xiao He. When Liu Bang proclaimed himself emperor, he was a big shot. Xiao He's official position is higher than Cao Can's, and their relationship is bumpy, which is not as good as before. When Xiao He was critically ill and recommended a successor, I didn't expect Xiao He to forget the old love, so I only recommended Cao Can. In this way, Xiao He front foot into the grave, Cao Can hind foot when the prime minister.

Cao Can became prime minister, but like most people, he didn't have to be a "new official with three fires", and everything had to be new. Everything Cao Can does is the old rule, and he does what his predecessor and old friend Xiao He decided, without any sense of "institutional innovation". That's not enough. He has his own unique standards in selecting and employing people. Anyone who is simple and inarticulate by nature is entrusted with a heavy responsibility. Anyone who has a glib tongue, harsh language and pursues official names will be expelled. As prime minister, Cao Can is a bit busy, soaking in a jar all day, regardless of specific affairs. Seeing that he had been in office for many days, colleagues and friends were worried about him, so they went to his prime minister's house to try to convince him. Unexpectedly, when guests come to your home, Cao Can treats them with good wine. Whenever the guests want to talk about things, Cao Can raises his glass and tries to do so until the guests are drunk. In the long run, it becomes a habit.

There is a small garden behind the Guo Xiang Building, next to the officials' dormitory. Like Guo Xiang, all the officials of Guo Xiang government drink and sing songs every day, which is called "Up and Down". Colleagues hate these things and think it's not good to go on like this. So I called Cao Can, hoping that he could control his subordinates. When Cao Can arrived in the small garden, instead of handling it, he ordered his men to drink and sing with them, which made his colleagues' noses angry.

In the long run, Cao Can's "absurd" behavior reached the ears of Emperor Hui Di. On weekdays, Hui Di saw that Cao Can had taken the high position of prime minister, and the way he played around also felt that something was wrong. One day, I called Cao Can to give him a hard-working lesson. Cao Can understood Hui Di's meaning and took off his hat as soon as he entered the door. He said to Hui Di, "Your Majesty is wise, SHEN WOO, but who is better than the first emperor?" Hui Di said, "How can I compare with the first emperor?" Cao Can said, "Who is more virtuous than my predecessor Xiao He?" Hui Di said, "You seem to be inferior to Xiao He." Cao Can said, "Your Majesty was born with a pair of eyes. You are absolutely right. Your Majesty, you see, Gaozu and Xiao He have laid a solid foundation, and local decrees have been promulgated clearly. Now that your majesty has a trick up his sleeve, the world can be at peace. As courtiers, is it not enough for us to strictly observe our duties and enforce the laws of the previous dynasty? " Hui Di is a clever man. As soon as he heard it, he said, "Well, don't say it."

Cao Can easily became prime minister for three years, and the people lived and worked in peace and contentment, and their national strength became stronger and stronger. After his death, the emperor made him the queen of Iraq. People think that Cao's participation in politics is very different from his predecessor's, but he has done a good job and managed the country in an orderly way. It is really a blessing for the people to have such a Guo Xiang. He spontaneously wrote a song for him, which was widely circulated and became a popular song at that time. This song goes like this:

"Xiao He has enacted laws, which are clear and fair, and the standards of officials and people are unified;

Instead, stick to good laws and never neglect their duties.

The world thinks that he is pure and inaction, so that the people can enjoy Taiyi. "

Later generations summed up Cao Can's story in four words, namely the idiom "Listen to Cao Cao". Although Cao Can is lazy, he is too lazy to be a good person.