Room 404, boys dormitory. This is not only the residence of the six people, but also their "reasoning war room". The interior of the dormitory is divided into a "reasoning whiteboard area", an "evidence (snack) storage area" and a "case file (examination paper) filing area". The dormitory manager, the takeaway cabinet downstairs, and even the laundry room will all become hiding places for key clues.
Concept: suspense reasoning