C199 A brilliant method
Putting aside the relationship between Wen Jike and the real An Rongyue, even if we can roughly deduce the procedure of the case based on the clues that we have, we are still unable to understand the reason behind Wen Jike and An Rongyue's actions.
The four dead people in Room 403, along with Qiao Kewei who was the scapegoat, didn't come into contact with Wen Jike, let alone kill him