Borrowing Yin and Yang

When I was twenty years old, on the way home from a delivery, my worldview was overturned. I saw ghosts for no reason, which led to a series of past events... From then on, in order to survive, I had to walk between yin and yang, working with ghosts and gods. After experiencing adventure after adventure, I discovered that the world is too complicated. What kind of story is hidden under the Tianchi on Kunming Mountain and the Hundred Curtain Triangle? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.