He is a demon fox who has been cultivating on Kunlun Mountain for nearly a thousand years. In order to avoid the catastrophe, he attached himself to the emperor Li Shimin. He taught him how to march and fight, teach him to seize the world, teach him to kill the king and force the palace, and teach him to be a king. Just to be attached to him, just to avoid the catastrophe of a thousand years, and to become an immortal. Who knows...
When he became the emperor of the Tang Dynasty, when his power was supreme, when he had three thousand beauties in his harem, but he was left with a choice between his love and his country, then why did he need him to conquer the country of the Tang Dynasty in the first place...