Han Fei, before the police arrived, used some techniques he learned from the Deep World to pry open the mouth of one of the students.
The so-called Sunday Night School is a very peculiar organization, where the teachers were once students themselves, entrenched in remote suburbs, spreading like a virus.
At first, these people only exchanged ideas verbally and never took any real action, but as the curriculum deepened, they started with small animals and gradually moved their target to living humans.
Just like the welcome ceremony Doctor Bai prepared for Shen Luo, their initial victims of torture and murder were all criminals. Once their inner sense of injustice and anger was vented, their blood-stained hands fell into the trap woven by "Doctor Bai" without their knowledge, step by step they broke through the bottom line of humanity and transformed into monsters.
