Su Xinghuo said, "Receptionist, can you describe the scene when you opened the door this morning?"
"After I used the key to open the door, I heard a thumping, vibrating sound from behind it. It was then I realized that the action of opening the door had torn a talisman affixed to the upper edge of the door frame."
"How long did the noise last? Was it very loud?"
"For about four or five breaths' time. It wasn't particularly noisy, but loud enough to wake someone sleeping. It could also be heard from the end of the corridor."
"Okay."
Su Xinghuo nodded. "Yuan Jia mentioned to me that the talismans he stuck on the door frame were all low-grade. They were made of thin, fragile paper, and the adhesive on the back was very strong. Once someone opened the door, the talisman would inevitably be triggered. Before leaving the room himself, he would affix one, using the force of closing the door to make it stick properly. He would also stick one before going to sleep at night."
