The Mad Emperor of the Cultivation World

"The Moonlight Treasure Mirror is a supreme divine artifact, said to possess the power to transcend time and space. Could it be... that I have returned to the past?" The young man stared at the scene in the hospital room before him, his thoughts drifting like the wind. His name was Ye Chen. Eight hundred years ago, an accident caused him to travel through time and space, from Earth to the cultivation world. He never imagined that he was a once-in-a-millennium cultivation prodigy, achieving in just eight hundred years a realm that ordinary people could not reach even in tens of thousands of years, becoming a leading figure in the cultivation world, revered as the 'Mad Emperor'! — Description from novelcodex.org