At the ghost market.
Once upon a time, it was a term that was spread all over Heluo.
When a young man walked on a deserted road in the middle of the night, the old man would warn him to be careful of running into the ghost market.
Humans have their own markets, and ghosts have their own markets. Although the ghost market wasn't filled with ghosts, most of them were evil spirits that couldn't see the light of day, but it didn't exclude a small number of outside cultivators.
Under the cover of the night, they carried out some evil transactions and were once very rampant. Especially when the world was in chaos, the ghost market could even directly sell living people.
After Heluo was established, it took a hundred years to stabilize the regime. From then on, they began to fight against the evil. Existences like the demon sect and the ghost market were the main targets of attack.