1 Three Families Retreat: During the Spring and Autumn Period, there was civil strife in Jin State, and Jin Xiangong's son Zhong Er fled to Chu State. King Chu Cheng took him in and entertained him. He promised that if there was a war in Chu Jin, the Jin army would retreat from three houses (one in Sanli). Later, Zhong Er returned to the State of Jin with the help of Qin Mugong. The state of Jin supported the struggle between Song and Chu, and the two armies met in Chengpu. Zhong Er avoided, lured the enemy in and won.

2 blockbuster: It is said that Chu Zhuangwang (also known as Qi Weiwang) spent three years in politics, having fun all day, and turned a blind eye to state affairs. A courtier said to Zhuang Wang, "I heard that there is a big bird in the countryside that doesn't fly for three years and doesn't sing for three years. What's wrong? " Zhuang Wang said: "This bird can fly without flying, and it will soar in the sky;" It will be a blockbuster if you don't sing. " Then, we will rectify state affairs, enrich Qiang Bing, and form a situation of great governance in just a few years.

3. Taste the courage: During the Spring and Autumn Period, Fu Cha, the king of Wu, defeated and captured Gou Jian, the king of Yue. Gou Jian fed the horse for three years and was tortured. After returning home, he decided to take revenge and rejuvenate the country. He asked Fan Li to help train the army, hire talents, take part in labor by himself, and insist on sleeping on firewood. He tasted courage before every meal, and finally destroyed Wu.