She is also him. The so-called emperor of Han Dynasty was a puppet all his life, trapped in a deep palace and controlled by others.
Jiangshan, to him, is a ridiculous existence, a shackles, and a nightmare. He is struggling in the deep palace, sitting on the world, but who knows that all he wants is a piece of pure land and peace. He knew that when he ascended the throne, he would lose everything, everything.