Son, I graduated from Xianfeng Primary School in Mudanjiang City, and my family lives near there. I heard about the toilet when I was a student there. It seems a little dirty there. But this is just hearsay, I have never really seen it. You did see it. I can't say whether what you saw is true or not, but I can tell you for sure that I didn't do anything wrong, and I'm not afraid of ghosts. As long as your heart is kind, don't be afraid of those. Also, maybe what you see is psychologically stressful. My advice is, if you still can't put it down, don't go to that toilet at night. The environment there is really bad. If not, ask some classmates to go with you when you go. If it still doesn't work, then I think you need to see a psychiatrist and transfer. I hope you are safe!