The golden tree standing tall in the world of Teyvat

A young man complained about the tragic ending of the Great Compassion Tree King while playing Genshin Impact, and by chance, he traveled to the world of Teyvat, but something unexpected happened on the way.
He traveled through time and merged with the remaining soul of the Great Compassion Tree King, and was renamed Liusu by the Great Compassion Tree King. Because he was a visitor from a higher-dimensional world, he could carry the forbidden knowledge of Teyvat.
As he thought, this world was fake, and he had a strong desire to save the world and make it real after accepting the identity of the Great Compassion Tree King.
(All made up, just for fun as it’s my first time writing a book)