After the Zi Zhi Rebellion, Prince Yan, who was escorted back, gained the loyal support of the subjects across the country and inherited the throne as King Yan Zhao.

, the prince of Yan who was escorted back gained the loyal support of the people all over the country and inherited the throne as King Yan Zhao. King Yan Zhao came to the throne when his country was ruined and everything was in ruins. He mourned the dead, comforted the orphans and widows, and shared the joys and sorrows with the people. He recruited talents with a very humble attitude, solemn etiquette, and generous treatment. King Yan Zhao had great respect for Guo Wei (guō wěi) said: " Qi State took advantage of our civil strife to send troops to defeat Yan. Although Yan State is weak and unable to take revenge, if we can get the wise men from all over the world to discuss state affairs with me, we can defeat the former king. I have no regrets. If you find such a talent, I will be happy to serve him personally."

Guo Wei said: "Your Majesty, please listen to me tell you a story first! With a thousand gold coins, he went to look for a thousand-mile horse, but it turned out that the horse was dead. The man bought the horse's head for 500 gold. The king was furious. The man said, "A dead horse is worth a lot of money, let alone a live horse." You can wait with peace of mind, Chollima will be delivered to your door soon. "In less than a year, three thousand-mile horses came to my door. Now, if your Majesty is really thirsty for talents, start with me. The wise men from all over the world who are better than me will definitely join your sect." So, Yan King Zhao then transformed Guo Wei's residence into a palace and respected him as his teacher. Sure enough, a large number of advisors and talents from the State of Yan gathered there, including Le Yi from Wei, Ju Xin from Zhao, and Le Yi was appointed As Yaqing, he presides over state affairs.

King Zhao gave all his best condolences to the counselors and talents who recruited talents, and constantly gave them high-ranking officials and generous salaries. In 285 BC, King Zhao and Le Yi discussed the matter of sending troops to attack Qi. Le Yi said: "Qi is a rich and powerful country. Our ancestors once We have become the overlord of in the Spring and Autumn Period , with a vast territory and a large population. We, the Yan State, cannot attack Qi alone. If you decide to attack Qi, it is better to unite with Zhao, Chu and Wei and send troops together." King Zhao sent Le Yi to . The State of Zhao also sent envoys to the State of Chu and the State of Wei respectively, and promised to the State of Qin through the State of Zhao that in the future they would share the benefits of the successful conquest of Qi.

All countries have long hated the arrogance and tyranny of King Min of Qi , and the joint attack on Qi won their unanimous approval. In the second year, Le Yi was appointed as a general by King Zhao, and the State of Zhao also awarded Le Yi the seal. The Qin army Joining forces with the armies of Zhao, Wei, and Han, the five-nation coalition forces of Yan, Qin, Han, Zhao, and Wei, under the command of Le Yi, attacked Qi in a mighty manner. King Qi Min also devoted all his national power to resist the coalition forces attacking Qi. , the two sides fought in Jixi, and the Qi army was defeated. Le Yi asked the Qin army and the Han army to return home first, separated the Wei army and seized the original Song Kingdom territory, deployed the Zhao army to recover Hejian, and the Yan army was Le Yi personally took command, chased Qi's defeated troops, and guided Huang Long.

Ju Xin said to Le Yi: "Qi is strong and Yan is weak. The defeat of Qi's army depends on the joint efforts of the five countries. Now we should attack the towns on its border in time to expand Yan's territory. This is a long-term plan. However, you leave these towns alone and instead seek the reputation of going deep into the hinterland. This approach will not shake the foundation of Qi and will not be of any benefit to Yan. Instead, it will create deep resentment and regrets in the future. " Le Yi said: " The King of Qi was arrogant and arrogant. He thought he had outstanding achievements and was extremely talented. He acted arbitrarily and self-willed. He made decisions without consulting his ministers. He abolished loyal ministers and virtuous people and trusted those who were flattering and sycophantic. His decrees were tyrannical and unkind and unpopular. The people were very resentful. Today Qi Qi The army of the country has been defeated. If we take advantage of the victory and go deep, its people will rebel against Qi and return to Yan. The rebellion will start from within. It is not a problem for Qi to belong to our country of Yan. If we do not take advantage of the victory and go deep, once the king of Qi regrets his past mistakes , change your ways, show compassion to your subordinates, and care for the people. Then it will be difficult to conquer Qi." Then he led the Yan army deep into the hinterland of Qi.

The State of Qi was really in chaos, and King Min of Qi fled in panic. Le Yi led his army into Linzi, the capital of Qi State, and transported Qi State's gold, silver, jewelry and precious sacrificial vessels ritual vessels to the State of Yan. King Zhao of Yan came to Ji in person. Go up to comfort the army and reward the soldiers, Le Yi was named "Chang Guojun", and stayed to continue to recruit surrender, or to capture Qi cities that had not surrendered. The Yan army took advantage of the victory and marched straight in. The Qi army was frightened by the news and was defeated without a fight. Le Yi Rectify the Yan army, strictly prohibit harassment and plunder, visit the wise and talented people of Qi, commend them and give them high courtesy, reduce the people's taxes, change the brutal decrees implemented by the previous dynasty, amend the previous laws, and the people of Qi applauded Say it well.

Le Yi divided his troops to attack in five directions, sending the left army across Jiaodong and Donglai. He , stationed troops in Dong'a , Zhencheng , and joined forces with the Wei army. The rear army marched along the Beihai Sea to suppress Qiancheng. The Chinese army guarded Linzi, the capital of Qi State, and the ancestors of Qi State Qi Duke Huan and Prime Minister Guan Zhong held a grand ceremony on the outskirts of the capital to praise the talented and famous people among the people in the city. Within half a year, more than 70 Qi cities were occupied by the State of Yan, and they were all incorporated into the counties of the State of Yan.