Am I Li Jiancheng? Dear Brother, Don't Kill Me!

I am Li Jiancheng, I don't want to be killed! Modern youth Li Jiancheng time travels to the body of the historical figure Li Jiancheng of the same name. Yes, he is the one who was killed by Li Shimin at Xuanwu Gate. Li Jiancheng, who knew he was powerless, gave in early. "This time, I will never make the same mistake again," Li Jiancheng thought to himself. Want the position of prince? I took the initiative to give way. Want to expand your power? I give you all my talents. Is it dangerous to go to the battlefield? I flew over to block the arrow. "Good brother, please ascend the throne!" Seeing the serious-looking Li Shimin saying respectfully, Li Jiancheng, who only wanted to be a useless prince, was shattered.