How Can I Allow Li Er to Touch My Tang Dynasty?

No system, no time travel, no rebirth. In the ninth year of Wude, Chang'an was bathed in blood. Prince Li Jiancheng caressed the newly acquired beauty's neck and listened to Wei Zheng's report about the unusual movements in Xuanwu Gate. He smiled. That night, Xuanwu Gate did not welcome its destined master. Li Shimin's armor was dyed with the blood of his parents and children, and he was chained in front of the Tai Chi Hall to witness his brother's ascension to the throne. When the new emperor changed his name to "Jingzhe", the spring thunder suddenly sounded and all the insects were frightened. From then on, the Tang Dynasty was ruled by a crazy genius. Li Jiancheng - He loves beauty and throws it away after using it; he is good at governing the country and has thunderous skills; he has an impermanent nature and is violent and arbitrary. He could recruit millions of civilians to build the Tower of Babel, and he could also use beauties in the harem as living chess pieces to play on a whim. He changed his reign name like changing his clothes: "Tiangong" built a lot of construction, "Taotie" searched all over the world, and "Yongye" painted the palace walls black. The civil and military forces of the Manchu Dynasty crouched in fear, and the enemy countries on the border trembled under the iron hoof. Li Shimin traveled around the country in an iron cage, watching his Tang Dynasty being reshaped into a strange monster. And the emperor on the dragon throne went to the extreme loneliness in the extreme power. This is not the Tang Dynasty you know. This is the flourishing age of a madman, the bliss of a tyrant, and the prison of a genius. How can I allow Li Er to touch my Tang Dynasty?