2. Idiom Story in Friends' Accidental Meeting Gratitude: At the end of the Eastern Han Dynasty, Dong Zhuo took advantage of the chaos of ten regular attendants and led the army into Luoyang to control the emperor. But Dong Zhuo also knows that if you want others to obey him, you have to show it. So he ordered Cai Yong to be an official, but Cai Yong looked down on him and refused. Now Dong Zhuo's face is dead. In order to force Cai Yong to come out, he actually instructed someone to threaten Cai Yong and said, "If you don't promise a family, don't blame me for fighting with your family!" Cai Yong a listen to these words, which dare not promise! So Cai Yong became Dong Zhuo's man. And this Dong Zhuo is really good to Cai Yong, and he is constantly promoted. Later, after Dong Zhuo was removed from Wang Yun's plan, everyone was celebrating. But Cai Yong is a face of sadness, but Cai Yong never imagined that Yun3 was very unhappy and questioned Cai Yong on the spot. "Cai's adult, since Dong thief is dead, everyone is happy, but why do you look sad? Unless you are really dead set on Dong thief? " Cai Yong was shocked and quickly explained: "Sir Stuart, I just feel sad because I thought Dong Zhuo had been grateful to me!" But Wang Yun just wouldn't listen, and finally ordered Cai Yong to be put in prison, which eventually led to Cai Yong's death in prison, which led to the chaos with Guo Si.