The Wanderer of Southern Xinjiang

I was studying in college abroad and received a call from the police station. All four members of my family died in the fire! I couldn't care less about being sad and quickly bought a ticket to go home. But I received a letter from my grandmother. The letter read: "Don't go home!" My family is from the Yin people of southern Xinjiang. Use your soul to travel between Yin and Yang. This lineage is passed from female to male, so I only know a little bit about it. I plan to go to hell and find my grandma's ghost. But when I light the soul-inducing candle, Only when I stepped into the underworld did I realize, Grandma, parents, and sister have died in vain and turned into ghosts...