第一章：天子守国门，君王死社稷

The emperor guards the country's gates, and the king dies for the country

Traveling through time one day, he became Li Chengqian, the crown prince of the Tang Dynasty!

It was the ninth year of Wude, when the throne was changing. The Turks took advantage of the chaos and marched south, burning, killing, looting, and committing all kinds of atrocities. Wherever they passed, there was devastation.

"Ding, mission, repel the Turks and defend the Tang Dynasty!"

On that day, Li Chengqian left a letter and rode away from Chang'an.

"The Son of Heaven guards the country's gates, and the King dies for the country."

"Blood debts must be repaid with blood!"

"Kill one person from the Tang Dynasty and the entire clan will be exterminated!"

Li Shimin: "With Cheng Qian as my successor, why should we worry about the prosperity of the Tang Dynasty?"

Barbarian nations: "Please spare our lives, Prince Saint."

Aristocratic families: "I regret that I shouldn't have become an enemy of the prince."

Main characters: Li Chengqian, Li Shimin, Wang Mingyuan, Liu Renyuan,

一朝穿越，成为大唐太子李承乾！
正值武德九年，帝位更迭，突厥趁乱南下，烧杀抢掠，无恶不作，所过之处，满目疮痍。
“叮，任务，击退突厥，守卫大唐！”
当日，李承乾留下一封书信，策马离开长安。
“天子守国门，君王死社稷。”
“血债，当以血来偿！”
“杀大唐一人，当灭全族！”
李世民:“朕有承乾，大唐何愁不兴？”
蛮夷诸国:“求圣太子饶命。”
世家大族:“悔不当初，不该与太子为敌。”

主要的角色:李承乾、李世民、王明远、刘仁愿、