Soon, I remembered Zhang Yi. He was a famous politician during the Warring States period. When the States of Chu and Qi joined forces to deal with the State of Qin, the King of Qin sent Zhang Yi to try to break the alliance between Chu and Qi. 

Zhang Yi was a smart person. At first, he bought a few important officials of King Huai of Chu. Then, he enticed King Huai of Chu by ceding some land to him. 

Soon, King Huai of Chu agreed to break the alliance with the State of Qi. Within one day, he demolished the alliance that Qu Yuan had spent years building.

After that, when King Huai of Chu learned that he was tricked by Zhang Yi, he turned his embarrassment into anger. He declared war against the State of Qin! Qu Yuan knew it wasn’t good for the State of Chu to start...