The Orphan of the Xuanwumen of the Tang Dynasty

The most unlucky time traveler in history. On the day of the Xuanwumen Incident, he became Li Jiancheng's son and was almost killed by Yuchi Jingde. Obtain the system at the critical moment, defeat Yuchi, and fight out of Chang'an single-handedly. With system and hard work, he rose up in Datang step by step. Just... For Li Yun in his previous life, Li Shimin was the emperor of the ages and a super idol. But for Li Yun, who traveled to the Tang Dynasty, Li Shimin was the enemy who killed his father. Should this revenge be avenged? Please give me your opinion, urgent! Waiting online! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.