Xiao Zhan ascended the throne as emperor at the age of sixteen and died in a rebellion at the age of twenty. He is smart and sensible, and has received an excellent imperial education since he was a child.
That person taught him the art of an emperor and the way to build a country, but he never taught him how to love someone.
Love is not robbery or possession, but the exchange of two hearts.
In the end, Xiao Zhan died, killed by his own uncle's sword.
But he never thought that he could live another life and go back to the time when he was five years old.
This time, he will definitely not make the same mistakes again, and he will never love as exhaustingly as before.
(Rebirth text, in one sentence, means that the emperor is reborn and begins his pursuit again, seizing the throne and so on.)