Soul-Locking Yin

I didn't believe there were ghosts in the world before. Although my grandma understood this, I always thought she was too superstitious. But this time I firmly believe it. If it's not a ghost, how can I explain the ghost coins! I told my grandma exactly what happened, and after she heard it, she also told me something that I had heard of before. After listening to grandma mention it again, I learned more things that others didn't know. It is said that people drowned in the Heisha River, and the bodies have never been recovered. People in several nearby villages have to rely on the river to wash clothes or take a bath. Since the river water looks black from a distance, the sediment on the bottom of the water is all black, so the name of the Heisha River comes from this. I don't know how long that river is, and I don't know when the haunting started. I just heard my grandma mention Zhao Tiezhu's death, which is still fresh in my memory.