In the first month of the spring of the tenth year of Lu Zhuang Gong, the two armies of Qi and Lu fought a decisive battle in Changlao. In the early spring, the weather was still very cold, and the warring sides began to line up as soon as the bellies were white in the east, and the cold wind blew the battle flags and hunted them. Cao Di rode in the same chariot as Lu Zhuang Gong and acted as his car right.

The Qi army had an advantage in numbers and psychology, but people had their own agendas, while the Lu army's belief in victory was very firm. After the formation was completed, Qi Huan Gong began to beat the drum, and the phalanx of the Qi army began to slowly advance towards the Lu army's defense line. Lu Zhuanggong raised his drum and hammer and prepared to launch an attack, but Cao Di stopped him and asked the Lu army to focus on defense.

A contact battle soon broke out in the front line of the two sides, and the soldiers of each platoon of the Lu army were close together, forming a thick human wall; The two sides were glued together, and the soldiers in the front row fell, and the back immediately filled up. Only one or two platoons of soldiers in the Qi division were able to participate in the attack, and the numerical advantage could not be brought into play.

Seeing that the attack was blocked, Qi Huan ordered the army to retreat, and when the Qi soldiers retreated, they kept turning back and laughing at the Lu people for their cowardice. After analyzing the situation, Qi Huan Gong and Gao Wei temporarily changed their tactical plan, and they decided to adjust the direction of the attack and storm the enemy's flank. The Qi division rested for a while, Qi Huan Gong beat the drum again, and the Lu army also adjusted the defensive formation according to the enemy's actions to strengthen the protection of the flanks. The second attack of the Qi people was also unsuccessful, and then a third attack was launched. At this time, everyone from Duke Qi Huan to ordinary soldiers began to become impetuous.

When the Qi people withdrew for the third time, Cao Di shouted, "Attack!" Lu Zhuanggong beat the drum hard, and dozens of war drums of the Lu army strongly responded to the monarch's order, and the Lu army attacked like a storm. The Qi people became more and more convinced that this would be a perfunctory battle during the previous attack, and thought that the Lu people would not dare to attack them; Since the enemy did not dare to fight, they could immediately return home with great force.

However, the Qi army was immediately attacked with a ferocious attack like a pack of wolves entering the realm. This tactic was tailor-made by Cao Di for the Battle of Long Spoon, not to mention the high-ranking officers, even Lu Zhuanggong did not know the content of the plan in advance; The morale of the Qi division has declined, and the Lu army is full of anger, so the sudden change will cause greater damage to the enemy.

The people of the Qi Kingdom, who had been invincible just now, now fled shamefully. Lu Zhuanggong was about to give the order to pursue, but was stopped by Cao Di. He jumped down to check the enemy's rut marks, and then climbed up to look at the enemy's flag formation, and then said, "It's okay!" The Lu army then pursued the enemy with all its might until they were exhausted.

The battle of the long spoon ended with the complete victory of the Lu State, and the people of the Lu State finally grew a bad breath; Lu Zhuang Gong held a grand ceremony for the army, which had not been held in Lu for a long time, and people seemed to see the hope of national rejuvenation - and it was only hope.

Lu Zhuang worshiped Cao Di as a doctor, and he asked Cao Di the reason for his victory this time. Cao Di said: "The source of combat effectiveness lies in courage. One blow, then decline, three and exhaustion; Qi Shi is exhausted after three drums, and our side is full, so we can win. In addition, Qi is a big country, and the behavior of a great power is unpredictable, and the ministers are afraid that the enemy will feint and lure our army into a trap; Later, the minister saw that the enemy's ruts were messy, the military flag was overturned, and the soldiers were scattered and running wildly, not like the act of luring the enemy, so he dared to defend and pursue. ”

The people of Qi returned to Linzi in despair. Qi Huan Gong ordered the establishment of an investigation team to conduct a thorough investigation of the situation, the causes and processes of the defeat. The results of the investigation shocked the people of Qi in general.

Qi Huan raised the bamboo slip in his hand and said to the doctors: "Qi has never had such a shameful thing happen!" The dignified teacher of a great country, the descendants of Emperor Yan, and the descendants of the Taigong were chased by the army of a small country and lost their armor, which really disgraced the face of the country and their ancestors! Defeat is not terrible, what is terrible is the reason for defeat!

"Let's see what happened: many formations in the army are not fully staffed, and some centurions don't even have centurions! Some even used slaves in their families to serve in their place, and some even drove chariots with old and weak lame horses! Treat the death and life of the country as child's play, how many more people have to publicize such crimes! This expedition is actually an army with insufficient soldiers, lack of servants, and shortage of baggage!

"Let the widow ask the sinners: Do you think that if you have violated the military law and have not done your duty, the widow can also violate the military law and spare you? If you have betrayed the people, the society, and the office, you are traitors to the country! The princes have no obligation to protect the Qi State, but they have the power to harm the Qi State; And the people of Qi are just the opposite! Qi and Lu will definitely shake hands and make peace, but sinners will never be forgiven! Because the violation of the duty of loyalty to the state is more serious than the crime committed by the enemy against the country! ”

Duke Qi Huan executed several high-ranking traitors on the spot, and punished some middle and low-ranking nobles as criminals. Qi Huan deliberately did not expand the situation to the point of prosecuting all the sinners, so as not to provoke a backlash from opponents. In this way, the conservative forces were crushed, and the reform of the management and central government was able to move forward significantly.

The state of Lu won the Battle of Long Spoon, but did not get peace because of it.