"At first, everything was normal, but more than half a year ago, things started to go wrong. The two siblings looked for me less and less, and in the end, both of them seemed to have disappeared. One day, Brother Lu Ning suddenly called me and said that he felt that his sister was not normal."
"Lu Ning said that Lu Si always liked to go to the bathroom alone at midnight and stay there until two in the morning before returning to bed to sleep."
"He didn't think that Lu Si was sleepwalking. He wanted to take her to the hospital, but Lu Si refused and kept arguing with him. Lu Ning wanted me to help him persuade Lu Si. If it didn't work out, we would tie her up and take her to the hospital."
"I didn't expect that the day after Lu Ning called, there would be news of his suicide. Because I had contact with him, I was also called by the police for questioning. That's how I found out how Lu Ning committed suicide."
