C139 Hospital the Disappearance of Children(3)

What were they doing here? Mcluhan's experiments were confidential, why would they suddenly appear? Where did they get the information?

"Miss Tomoko... Miss Tomoko... " Faintly, I heard a familiar voice. I followed the voice and walked towards the direction of the voice, and saw that outside of the machine wall formed by Xiao Hei, there was indeed a familiar voice that called out my name