One is Qin Mugong. In 628 BC, despite the strong opposition of the adviser, uncle Jane, a general expeditionary force was sent to attack Zheng. Because Zheng Zao was prepared, he had to return in vain. On the way home, as uncle Jian expected, he was ambushed by Jin Jun in Yaoshan, and the general was captured and wiped out. In the face of his own fiasco caused by opinionated opinions, Qin Mugong did not shirk responsibility and blame his subordinates, but publicly admitted his mistakes and repented. He is "a humble servant, a rural teacher, crying and saying,' It's also a sin to be lonely if you don't obey Uncle Jian and humiliate the second and third sons.'" Not for Meng Ming, he said, what's wrong with being alone, doctor? I won't cover up my virtue with a trick. "(see Zuo Zhuan) Qin Mugong's sincere and frank mind and resolute attitude of correcting mistakes won the respect of his subjects. Three years later, Qin Jun finally defeated the Jin army in the Battle of Pengya, which made Qin gain great prestige and laid an important foundation for later hegemony and even reunification of China.

The other is Yuan Shao. At the end of the Eastern Han Dynasty, Yuan Shao, a hero in northern Hebei, did not listen to Tian Feng, an adviser, and rashly launched the battle of Guandu, which was defeated. Yuan Shao not only refused to admit his mistake, but whitewashed it and killed Tian Feng. His stubborn insistence on his own mistakes, coupled with his narrow-mindedness and biased opinions, led to low morale, panic and brain drain, which was finally destroyed by Cao Cao.