C671 Rui
Since he already knew it was the spirit of the ghost girl, Xia Rui. This was because the method was exactly the same as the one he used in Teacher Li's house. Thus, they knew that little Rui had come. If it wasn't for Su Yue, Teacher Li would have probably been strangled to death by him.
"Little Rui. Little Rui. Is that you? Did you come back? I know it's you