In order to clean up the mess left by his father, Lu Yingong began to mend the bad relations with neighboring countries.

In the last years of Lu Huigong, there was a war between Lu and Song; Although the two countries intermarry with each other, kinship can no longer be a guarantee of state relations. Lu Yingong then sent an envoy to the Song State to release a positive and friendly diplomatic signal to the Song State.

The Song State was originally the fall of the Shang Dynasty, and coupled with the rebellion of the Three Prisons, the eyes of the people of the world looking at the Song people were full of distrust and hostility. In order to integrate into the big family of the Zhou Dynasty, the Song State pursued a moderate foreign policy of kindness and moderation with the princes of the world from the beginning of the Weizi period. Therefore, under the guidance of the above thoughts, the Song people happily accepted the olive branch handed by the Lu people.

However, Lu Yingong was particularly troubled by Qi Guo and Zheng Guo. Qi Guo is because the grievances between the two countries have a "long history", and he is really not sure that they can be resolved in a short time; For Zheng Guo, it is because there is an unbreakable knot in the psychology of the hidden prince.

It turned out that during the reign of Lu Huigong, there was a major war between Lu and Zheng, which ended in the defeat of Lu and the capture of Gongzi Xigu. She was placed under house arrest in the home of a doctor in Zheng Guo and was able to escape through many difficulties. Because of this history of humiliation, Lu Yingong was never willing to take the lead in showing a conciliatory gesture to Zheng Guo.

Zheng Zhuanggong also knew this, so he wanted to take the initiative to approach Lu Guo to eliminate the obstacles in Lu Yingong's heart. But before he could make contact with the state of Lu, the state of Zheng was invaded by foreign enemies.

It turned out that after Gongsun Hua fled to Weiguo, he tried his best to persuade Wei Huan Gong to attack Zheng Guo, and hoped to profit from the chaos. Duke Wei Huan was reluctant to wade into troubled waters, but later Zheng Zhuang put Wu Jiang under house arrest, and Gongsun Hua took the opportunity to provoke and said: "This is a ruthless ravage of the mother of the world, a wanton trampling on Zhou Li, and a serious violation of the royal family." The prince should follow the example of the first monarch and the prince Wugong, and crusade against the court to restore the ancestral industry! Wei Huangong, who is known for his pure filial piety, couldn't sit still anymore when he heard these words.

The doctor would rather kneel down and persuade Wei Huan Gong to say: "How ridiculous is this kind of high-sounding reason coming out of the mouth of a chaotic minister and thief! And it is precisely because it is ridiculous that it seems especially unjustifiable; He prides himself on being a gentleman, but there is no precedent in the world for a gentleman to ask others to invade his motherland. So he is a villain, and the prince can't listen to the instigation of that villain, and he can't start a war with Zheng Guo. ”

However, Wei Huan Gong had already fallen into the confusion of a group of traitorous ministers, and after attending the funeral of Lu Huigong, he hurried back to China, and then began to prepare for the war on Zheng. In October, Duke Wei Huan led a rebellious army to advance into Zheng State. The guards marched all the way and quickly captured the important town of Liyan in the northern part of Zheng State, and placed Gongsun Hua there.

Zheng Zhuang Gong was furious, and immediately ran to the royal city, and sued Wei Huan Gong in front of King Zhou Ping. King Zhou Ping was old and incompetent, and he was unwilling to get involved in the disputes between the princes, so he pushed the problem to Zheng Zhuang Gong and let him do it at will. Zheng Zhuanggong, as a secretary of the dynasty, mobilized the army of Wang Shi and Beiyu to prepare to attack the country.

At the same time, the Zheng people sent an envoy to the state of Yi to ask for help in the war, and the Zheng envoy sent a message to the emperor, saying that the Duke of Zheng Zhuang hoped to express his willingness to reconcile with Lu Hou through the emperor. After receiving the benefits of Zheng Guoren, Yi Zike immediately went to Lu Guo, and he found Lu Yingong's uncle Gongzi Yu, hoping that he would persuade Lu Yingong to become a teacher.

After listening to Gongzi Yu's words, Lu Yingong remembered his unbearable experience in Zheng Guo, so he said: "The widow left a lot of regrets in Zheng Guo back then, and Wei Guo is a traditional ally of our country. Wei Hou had just attended the funeral of the ancestors, but Zheng Bo did not come. On what grounds did the uncle let the widow help the enemy attack his friend? ”

Since Lu Yingong refused the proposal to send troops, Zheng Zhuanggong's hot face was attached to Lu Yingong's cold buttocks. But Gongzi Yu has already received a huge bribe and guaranteed to the people of the country. Seeing that he couldn't convince Lu Yingong, he bypassed the monarch in a fit of anger and led his private army out on his own.

Afterwards, Di Zike expressed his shock at Gongzi Yu's contempt for the monarchy, and Gongzi Yu said: "Since that person does not regard himself as a monarch, I do not need to obey his orders." ”

Zheng Zhuang gathered the above-mentioned troops and marched to the border of the Patriotic Empire. The huge momentum of the coalition army frightened the patriots, and Ning knelt down and asked: "The royal family defended by the prince is attacking the kingdom, can you explain to the minister why?" ”

Wei Huan Gong blushed and couldn't answer, and the Wei army didn't dare to confront Wang Shi, so he hid in the city and didn't dare to come out. The coalition army circled the city in a grand manner, destroying some of the defenders' fortifications, and then withdrew in an orderly manner. Gong Zheng Zhuang took the opportunity to recover Yanli, and Gongsun Hua fled to Weiguo again.

Soon, the envoys of Beirong came to the state of Lu and asked Lu Yingong to go to the hidden land (southwest of present-day Jining) to meet with Rongzi in order to continue the old friendship. Later, during a meeting held in the Hidden Ground, Rongzi asked for an alliance with Lu. This was a major matter related to the national strategy, and Lu Yingong politely rejected the proposal after carefully considering the multilateral relationship with the princes. But half a year later, the situation changed, and Lu Yingong agreed to form an alliance again.