One day, Qi Jinggong favorite horse suddenly died, Qi Jinggong very angry and wanted to dismember breeders.
Yan Zi asked Qi Jinggong: “do not know if Yao and Shun (two Chinese mythology, the king of this era) when the dismembered people, starting with what parts of people start with?”
Qi Jinggong a bit embarrassed and said: “That’s the horse people get locked up it.”
Yan Zi said: “Please let me announce his crime for you let him know how serious the crime committed, and then imprisoned, can not you?”
Qi Jinggong said: “Good!”
Thus, Yan Zi of the horses of them said: “You have committed three capital crime: the king let you horse, you do not keep a good, committed a capital crime; and the death of the king’s favorite horse, which is the second capital offense; let King because of a horse and killing, it will cause resentment Sagittarius, accusing the King, the other the king joke our king, this is the third death sentence. So now put your incarcerated. ”
After listening to Qi Jinggong sigh, said: “freeing breeders bar!”

Later Yan Zi became prime minister, Qi Jinggong right Yan Zi said: “Your accommodation close to the market, dusty and noisy, I’ll give you a change in accommodation it.”
Yan Zi tactful refusal, said: “Other people can live, I can live, otherwise someone would say that I am extravagant. And close to the market, shopping is also convenient and good.”
Qi Jinggong said with a smile: “Do you know what market price?”
Yan Zi said: “Yes!”
So Qi Jinggong asked: “What has recently sold expensive, sell anything cheaper?”
Yan Zi said: “The prostheses sell expensive shoes, sell cheap. (This is the implementation of Yan Zi Qi Jinggong metaphor of amputation of the foot too many penalties)”
Qi Jinggong very surprised, so ordered the amputation of feet eliminating the penalty.
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So later that people who use “prosthetic expensive and cheap shoes” as a metaphor to describe the means the cruel laws.