It was also because Li Fangyuan killed Zheng Mengzhou that Wang Yao lost his biggest support. The last political obstacle to the establishment of the Joseon Dynasty was also removed.

Finally, Li Chenggui, who had purged most of the opposition, officially replaced Wang Yao on the throne in July 1392.

On the second day of his accession to the throne, he sent Zhao Pang to the Ming Dynasty, the suzerain, to report to Zhu Yuanzhang about his accession to the throne in the name of "Quanzhi Goryeo State Affairs".

Zhu Yuanzhang always believed that Goryeo at that time was a country of "rebellion between monarchs and ministers", and Zhu Yuanzhang always believed that Li Chenggui was the son of Li Renren, the prime minister of Goryeo.

He believed that Li Chenggui's change of dynasty was an act of disloyalty and injustice.

However, due to Li Chenggui's special emphasis on the fact that it was he who withdrew troops through Weihua Island to stop the Goryeo court's plan to attack Liaodong.

In view of Li Chenggui's pro-Ming attitude, Zhu Yuanzhang passively admitted the fact that Li replaced Wang.

At the end of the same year, Li Chenggui sent someone to Zhu Yuanzhang to adjudicate the country name.

Zhu Yuanzhang replied: The name of Dongyi, but North Korea is called beautiful, and its origin is far away, so it can be named after its ancestors. Titian herdsman, heir of Yongchang.

So Yi Sung-gye was ordered to remove the name of Goryeo and use the name of Korea instead.

The Joseon Dynasty was born.

But after Li Chenggui ascended the throne, an unexpected thing happened, because he favored the queen Kang of Shende, Li Chenggui actually abolished Chang Liyu and established his youngest son Li Fangshuo as the son.

Later, in order to maintain the status of the prince, Li Chenggui, at the instigation of Chung Daochuan, tried to bring the private armies of the princes and military ministers into the unified management of the country.

This move, of course, aroused the dissatisfaction of the meritorious forces headed by Li Fangyuan. Therefore, the political struggle between Li Fangyuan and Zheng Daochuan intensified.

Why should Zheng Daochuan stay away from Li Fang? The reason is simple: Chung Do-chuan's vision of North Korea's political organization is a "parliamentary government agency system," that is, the prime minister has a major decision-making power over state affairs.

In the future, if Li Fangshuo inherits the throne, he will be easy to control, and on the contrary, if the strong Li Fangyuan inherits the throne, then his power will definitely be greatly weakened.

That's why he opposes Li Fangyuan everywhere.

Soon after, Li Chenggui dismissed the private soldiers led by his sons.

However, what no one expected was that Li Fangyuan's wife, Min Shi, had already hidden a lot of weapons under the cellar of her home in order to prevent the situation from changing.

Later, Li Chenggui was seriously ill, and Li Fangyuan, Li Fanggan and others stayed in the west corridor outside the Qinzheng Gate of Gyeongbokgung Palace in Hanyang to facilitate the care of Li Chenggui.

Zheng Daochuan planned to use this opportunity to summon Li Fangyuan and others into the palace under the pretense of Li Chenggui's order, and then wipe them out.

Unexpectedly, this plan was known to Li Fangyuan's brother-in-law, Min Wuji.

Min Wujian told Li Fangyuan about Zheng Evangelism's plan through his sister.

At this time, Li Fangyuan's confidant Li Shufan led Zhenling (the tomb of Queen Shendeok Kang's family) to move an army back to Hanyang.

So Li Fangyuan asked Min Wujian and Li Shufan to stand by near his home, and then returned to the palace again.

Sure enough, it wasn't long before the palace sent someone to summon the princes into the palace. Li Fangyuan pretended to have a stomachache and wanted to go to the toilet, but Li Fangyi and Li Fanggan felt that something was wrong, so they left with Li Fangyuan.

After Li Fangyuan returned home, he met with Li Shufan and Min Wuji, and then everyone first ran to the house of Nan Yu's concubine (Zheng Daochuan and others were gathering at this time), set fire to the house, forced Zheng Daochuan and others to show their faces, and then beheaded them and others.

After dealing with Zheng Daochuan and others, Li Fangyuan and others entered the palace to disarm the military belonging to Li Fangshuo's party.

After Li Chenggui learned of this, he knew that the wood was already in the boat, so he had to be forced to accept the minister's opinion and change the son.

Originally, all the ministers elected Li Fangyuan as the son, but Li Fangyuan asked Li Chenggui to establish his brother Li Fangguo as the son.

Li Chenggui had no choice but to agree, and this turmoil is known as the "First Prince Rebellion".

Soon, Li Fangguo ascended the throne, and Li Chenggui became the king. Because Li Fangguo and his wife Jin have nothing to do. Therefore, the issue of the establishment of reserves has once again touched the nerves of the DPRK.

According to tradition, if the king has no heirs, then the brother will end up with the younger brother, because the third Li Fangyi has no intention of the throne, the fourth Li Fanggan feels that he should become the prince in order.

However, the vast majority of officials above the court supported Li Fangyuan. This made Li Fanggan very dissatisfied.

So Li Fanggan decided to raise troops against Li Fangyuan, and he told his wife and nephew Li Lai about his plan, and Li Lai told Yu Xuanbao about it.

And Yu Xuanbao is also Li Fangyuan's teacher, he can't bear to be killed by Li Fangyuan, so he sent someone to tell Li Fangyuan about Li Fangyuan's plan.

Therefore, Li Fangyuan had already prepared for Li Fanggan's army.

But Li Fangyuan, who had experienced the "First Prince Rebellion", did not want to kill each other again, so he sent someone to Li Fanggan's camp, intending to shake hands with Li Fanggan and make peace.

Unexpectedly, Li Fanggan rejected this proposal.

So the two fought on the streets of Kaijing.

In the end, Li Fangyuan won the war, and Li Fanggan was exiled.

It is known as the "Second Prince's Rebellion".

After experiencing this series of events, Li Fangguo no longer wants to see the situation of brothers killing each other.

So, on the fourth day of February 1400, Li Fangguo established Li Fangyuan as the prince of the king, and on November 11 of this year, he ceded the throne to Li Fangyuan.

Li Fangyuan's actions made Li Chenggui hate him, and Li Fangyuan not only killed his two sons and son-in-law, but also indirectly caused himself to abdicate early.

So, later Li Chenggui left Hanyang and went to his hometown of Xianxing. Li Fangyuan sent people to Hamxing several times to ask Li Chenggui to recognize the legitimacy of his regime, but all the envoys he sent were beheaded by Li Chenggui.

Later, Li Chenggui met with Zhao Siyi, a relative of Queen Shendeok, the envoy of Anbian Province in the northeast.

After the two discussed, they decided to raise troops to attack Li Fangyuan.

The rebels were invincible at the beginning and were defeated.

Li Fangyuan, who learned of this, decided to personally lead an army of 40,000 troops to quell the rebellion.

Zhao Siyi, who heard the news, felt that the situation was not good, he only had more than 10,000 soldiers and horses, how could he resist Li Fangyuan's 40,000 army?

So Zhao Siyi went around pulling Zhuang Ding and forced them to enlist in the army.

Unexpectedly, as soon as Li Sui and Jin Shihou arrived in North Korea, they encountered officers and soldiers coming to arrest them.

Before Li and the others could escape, they were surrounded by a regiment of officers and soldiers.