During the Warring States Period, there was a scholar named Su Qin who went to the state of Qin to give advice to King Hui of Qin, but was not accepted by King Hui of Qin. In a fit of anger, he lobbied the six countries of Han Wei, Zhao Qi, and Yan Chu to join forces to attack the state of Qin.

One day, Su Qin, who was in Qi, was unfortunately stabbed by an assassin and was in danger. The King of Qi immediately ordered the murderer to be arrested, but the assassin was nowhere to be found and could not be captured. Before Su Qin died, he offered a strategy: "After I die, please ask the king's generals and ministers to be dismembered and posted a notice to weave a crime, saying that I was sent to Qi by the state of Yan to subvert the dynasty and beheaded.

After Su Qin's death, King Qi followed Su Qin's plan and posted the yellow list, inviting righteous people to come and receive the reward, with a reward of 1,000 taels of silver. As soon as this list came out, four people came to receive the reward. Seeing the four of them, King Qi asked, "How do you divide the four of you with the 1,000 taels of gold?" The four said in unison, "Two hundred and five each." King Qi slapped the table and was furious: "Come on, push these four'two hundred and five 'out of the door for me, and cut off their stupid brains with a knife. Humph! It's so stupid that there is no medicine."

These four people were killed like this, and the real assassin, who was said to be the killer sent by the state of Qin, had long since fled back to the state of Qin. Since then, the saying "two hundred and five" has been left in the folk, and people often use it to describe fools and idiots.