She accompanied him from the humble beginning of his life as a young prince to the ninth and fifth emperors, she protected him from swords, planned for him, and suffered the world's rebuke for him. On the day he ascended the throne, he gave her the power to kill everyone in her family, deposed her from the throne, and relegated her to the cold palace.
He has all the power in the world, and he has everything in his hands, but he has lost the one Su Zhiyi who loves him to the core.
Later, he knelt all over the Nine Palaces of the Great Snow Palace to beg her to come back, but there was no more Su Zhiyi in the world. For the rest of his life, thousands of miles away, he was the only one left with regrets.