In the summer of this year, Lu Cheng's Duchess Qi Jiang died. The Duke of Qi Ling ordered the women surnamed Jiang who married to the countries of the country to go to the country of Lu to give funerals to the deceased; Since the woman could not travel alone, her husband had to travel with her. This is also an unreasonable order, it is simply the queen of Qi Jiang as the Son of Heaven.

Lai and Qi also had a marital relationship, and Qi Linggong specially sent an envoy to summon Lai Hou. Laihou said angrily: "Qi Huan doesn't treat a widow as the king of a country!" He hates the widow and does not die, how can the widow do what he wants? ”

Since Laihou refused to travel, the Qi people had an excuse to attack Laiguo again. Yan said weakly: "The capital of Laiguo is large and difficult to attack, so it is better to strengthen Dongyang (now east of Linqu County, Shandong) as a bridgehead for attack." Dongyang is located on the border of Qi and Lai, so Qi Linggong ordered him to increase the height and strengthen the city wall of Dongyang.

For the next three years, Qi often bluffed against Lai, and the Laides relied on bribes to maintain fragile bilateral relations, during which the two countries signed a symbolic peace agreement. After signing the agreement, the Qi people withdrew the labor and army from Dongyang.

Zhengyuzi said: "China should step up military training and preparation for war, and no country in the world relies on bribing the enemy to preserve its social system." Otherwise, what else do you want the army to do? If the country does not strengthen its armament, it will inevitably perish. ”

Laihou said: "The country is strong enough, and the Qi people have also withdrawn their troops from Dongyang; Moreover, if the armament development continues, it will cause a backlash from the Qi people - after all, the two countries have a contract first. ”

Zhengyuzi said: "What the people of Qi ask us to abide by is exactly what we need to break. Could it be that the terms listed by the people of Qi are for the benefit of the country? The contract says, 'No expansion,' but why not? Even if the army is expanded, Lai Guo will dare to take the initiative to attack Qi State? Is it not okay for our country to expand its military only for self-preservation? The Qi people withdrew from Dongyang because the walls of Dongyang had been reinforced, and it would be a waste of labor to stay for one more day. Once the time is ripe, Qi Shi will inevitably set foot on the land of Laiguo, and then the prince will regret it, and it will be too late. ”

However, the old and dim-witted Laihou still firmly believed in the so-called "strategy" and "covenant", and categorically rejected the suggestion of the righteous public opinion. Zhengyuzi found Wang Yu and said, "The kingdom of Lai is about to perish, what is the master's plan?" ”

Wang Yu said: "The son of the country once said to me: 'Loyalty is the foundation, righteousness is the work; Nothing else needs to be considered. ’”

In the fifth year of Lu Xianggong (568 BC), the battle of Qi to destroy Lai officially began.

Several heavy rains in the summer of four years caused the collapse of a section of the old city wall in Dongyang. In April of the fifth year, Yan Wan and Chen Wuyu (Chen Gongziwan's descendants) went to Dongyang with a huge team of soldiers and miscellaneous servants to repair the city wall. The Qi people were building the city wall while secretly increasing their troops.

After gathering the strength of an army, Yan Wan immediately led his army to besiege the capital of Laiguo. The other two armies were led by Qi Linggong and Cui Zhu to join forces with Yan's weak army.

The Qi people were not busy attacking, but dug a circle of trenches around the capital outside the city, and used the soil in the trenches to pile up dozens of tall earthen platforms along the four sides of the city wall, and surrounded the Lai Kingdom. After the completion of the project, Qi Linggong transferred half of the army back to Qi, leaving half to besiege the capital.

The siege lasted from the spring of the fifth year to the spring of the sixth year, during which the Lai made several large-scale sorties, but the Qi army relied on the favorable terrain to crush the enemy's attack. The Qi people were still not in a hurry to attack the city, but kept digging to expand the area of the high platform, so that they gradually approached the city wall.

In March of the sixth year of Lu Xianggong, the food in the city of Laiguo was about to run out, and the people of Laiguo were about to feel the suffering of the Song people who were besieged by the Chu army.

The Lai people decided to be the last game, and Zhengyuzi secretly escaped from the capital, and went through great hardships to Tangdi (southeast of present-day Pingdu, Shandong), where he armed an army.

On 15 March, Zhengyuzi took his army outside the enemy's line of defense and attacked the weak points of the Qi encirclement. Wang Hu led the army in the city to break out. The Qi army's defensive line was stretched too long, so the two Lai armies would soon be reconciled.

Yan Qiao immediately summoned the scattered Qi army, intercepted most of the enemy forces as the Lai people passed through the trenches, and pushed them back into the city. The lucky few were able to escape.

When Yan Wan learned of the situation in the city, he immediately filled in the earth and built the platform day and night, and finally connected the earth platform with the city wall. On March 27, the Qi army launched a fatal blow against the Lehin. The energetic and high-spirited Qi ** soldiers rushed to the high platform and rushed to the enemy's city wall, and the Lai people were so hungry that they couldn't even hold their weapons at this time. The defenders finally threw down their weapons and surrendered to the Qi people.

The Qi people did not encounter much resistance in the city, and the soldiers rushed into the palace, but they could not find Laihou and the princes. Later, it was learned that the Lai had dug a tunnel to the outside of the defense line, and the nobles had secretly escaped through the tunnel before the Qi army launched an offensive.

After the Qi division occupied the country of Lai, it was repaired for two days. At this time, a scout reported that Laihou had fled to Tangdi, and Yan weakly ordered Chen Wuyu to deal with the endgame, and he immediately led the main force to surround Tangyi through a rapid march. Chen Wuyu left a part of the army to garrison Lae City, and ransacked all the palace treasures, giving them all to Qi Linggong first. After doing these things, he immediately rushed to make peace with Yan Weak.

Wang Yu and Zhengyuzi wanted to flee to the south, but the two were detained by the Ju people when they passed through the Ju country. Ju Guo has always been the little brother of Qi State, and Ju Zi happily cut off the heads of the two people and sent them to Qi State.

Tang is the second largest city in Laiguo, the city is large and majestic, the city wall is strong, the population is large, the supply is abundant, easy to defend and difficult to attack. The Lai refused to surrender and were determined to fight the enemy to the end. At this time, there was a commotion in the mood of the Qi division, because the sergeants had been on the expedition for a whole year, and they thought that they would be able to return to the division victoriously by capturing Laiguo, but they were dragged to Tangyi for the next war that did not know when it would end.

Yan Wan then handed over the command to Chen Wuyu and rushed back to Linzi to meet Qi Linggong. When Qi Linggong learned of the situation, he was also very worried, and he was afraid of a mutiny, so he gathered another army. Yan Miao led the new army to Tangyi and withdrew the Qi division that had been away for a long time to Qi State.

The Qi people still used siege tactics, but the Tang people were even less patient than the people in the capital, and they went out of the city to fight the enemy several times, only to return with a feather in a feather, but also to consume valuable living forces.

On December 10, the Qi people captured Tangyi, which had run out of ammunition and food, and the resisters laid down their arms. In the spring of the following year, Qi Linggong moved the Lai people to other places, and requisitioned a group of people from Qi to move them to Tang. The Qi people also drew maps of the newly added land, and rewarded some of them to meritorious officials.