In 1388, Li Chenggui launched Huijun in Weihua Island , and later abolished the King of Korea Wang Wu 、 Wang Chang , and embrace Li Gongrang Wang Wang Yao 。 In 1390, Yin Yi and Li Chu, the Koreans who fled to the Ming Dynasty, accused Li Chenggui of monopolizing power and violating the Ming Dynasty. Although there was no further response from the Ming Dynasty, Li Chenggui resigned from the bodyguard and accepted the appointment of the king Zheng Mengzhou In order to guard the middle court, to check Li Chenggui's faction. In 1392, Li Chenggui fell off his horse in Haizhou, and Zheng Mengzhou took the opportunity to exile Li Chenggui and his followers Zheng Daochuan wait forsomeone. Li Fangyuan The assassination of Zheng Mengzhou saved Li Chenggui Group from the crisis of collapse, which stood out. Later, he ordered his officials to persuade Li Chenggui to ascend the throne. [1] Although North Korea has been founded, Li Fangyuan, who has made great contributions to the country, has been excluded from the list of candidates for the son of a son Li Fangshuo Becoming a son. In addition, Li Fangyuan was forced to give up his elite "Gabriel" (Nuzhen Chief and 500 families under Li Chenggui's control, Li Chenggui gave Li Fangyuan at first) to another half brother Li Fangfan 。 [2] Li Fangyuan was also sent to the Ming Dynasty. Because the relationship between Ming and Xian worsened at that time, it was a tough job, but he solved the diplomatic problems with the Ming Dynasty very well. [1] In 1396, a diplomatic crisis occurred between the Ming Dynasty and North Korea. Emperor Taizu of the Ming Dynasty On the pretext of North Korea offer congratulations on New Year's Day The word "frivolous and insulting" was used on the note to investigate the responsibility of the North Korean side, and later Li Chenggui's confidant was named Zheng Daochuan Go to Nanjing. [3] Zheng Daochuan claimed that he was ill and refused to go, and encouraged Li Chenggui to attack Liao and offend Ming. because Zhao Jun The plan to attack Liaoning was shelved due to the strong opposition of. However, as the array training continued, the soldiers' dissatisfaction with Zheng Daochuan rose. The array exercise has been continuous since the founding of the country, and the intensity is also high. Since 1398, Taizu has often been ill, which is related to the stability of the political situation. Therefore, well-trained military forces are needed as the backing to ensure the stability of the country. At the end of July, after the surprise inspection of the training in the towns, only Luozhou Town barely reached the standard. [6] At the beginning of August, Taizu punished more than 200 commanders who slack off in the array drill. [4-5] A few days later, the "guard card" of princes (except Li Fangfan) was disbanded, which was exactly the deployment of Zheng Daochuan's "revolutionary private army". [1-2] "Revolutionary private forces" made Li Fangyuan and others feel more crisis. Although this was a measure taken by Taizu, it was actually Zheng Daochuan who led the way. Li Fangyuan heard about it as early as March 1398 Nan The discussion of changing private forces by Helun When asking for countermeasures, Helun advocates that it is better to start first. So Li Fangyuan united the anti Zheng Daochuan forces with Helun as the center and decided to raise an issue when Taizu was seriously ill. [1] On August 26, Li Chenggui was seriously ill in bed. Li Fangyuan claimed that Zheng Dao planned to kill the princes and enlisted soldiers in Seoul. That night, Zheng Daochuanzheng, Nan Xuan, Shen Xiaosheng and others talked and laughed at Nan Xuan's concubine's house unpreparedly, so Li Fangyuan's raid was easy to succeed, and Shen Xiaosheng, Zheng Daochuan and Nan Xuan were killed successively. [1-2]
After getting rid of Zheng Daochuan, Li Fangyuan gave the position of the prince to his second brother Li Fangguo 。 Later, he abandoned Shizi Li Fangshuo And his mother and brother Li Fangfan , brother-in-law Li Ji All were killed. Li Fangguo was enthroned by Zen soon after, which was to establish Buddhism. Li Fangyuan was not only elected as the first class official of the establishment of society, but also added as the first class official of the founding of the country, serving as the right-wing military temperance envoy and holding real power. But he and his fourth brother Li Fanggan There was another power struggle, and it happened again more than a year later The Second Prince Rebellion 。 [1] 
