I Have a Treasure Gourd

This is a martial arts world where you can open mountains and rivers with your palms and crush the void with your sword. It is also a scary world where demons are rampant and ghosts are everywhere. Living in this world, Gu Yiwei, who traveled through time, looked up to the sky and said: "My name is Gu Weiyi. Throughout the ages, I am the undefeated human emperor. I am Gu Weiyi!"