According to legend, as far back as the Spring and Autumn Period and the Warring States Period, Confucius, a famous thinker and educator in China, taught in his hometown, among which his famous disciples were Mencius, Yan Hui, Ceng Zi and so on.

At that time, because students were poor, there were many cases of losing pens, ink, paper and inkstones. Whenever Confucius asked who stole it, everyone said it was Yan Hui. Confucius criticized him, but he didn't distinguish, but he still studied hard and did his duty.

After many observations, Confucius found that Yan Hui was not like a thief, so he thought of a way: on his way to school, Confucius sealed an ingot of gold with red paper, wrote down "An ingot of gold for Yan Hui from the sky" and threw it on the way home in Yan Hui. Observing Yan Hui's action in the distance, Yan Hui saw the gold and didn't put it in his pocket. Instead, he added a sentence to it: "Only outsiders don't kill the poor" and then threw it on the road.

"An ingot of gold is a godsend to Yan Hui, and being rich abroad does not kill the poor" is not only a neat antithesis, but also reflects the quality of Yan Hui.

When Confucius saw this, he was very appreciative. He clearly saw Yan Hui's character. From then on, whoever framed Yan Hui for stealing will be severely punished and will tell everyone about it.

Yan Hui's noble character and studious spirit eventually became one of the four representatives of China Confucianism.