Qin Zhao and Shangguan Qiu found the hotel's security personnel and checked the hallway surveillance footage.
The video showed a local man, his face concealed, arriving at the door of the room that afternoon and hanging up a black plastic bag containing a dead rat.
The hotel's elevators required a room card to operate, and this man had come up the stairs. When he arrived, the fire escape door just happened to be open.
Even with the surveillance footage, it was actually of no significance.
Judging by his attire, he appeared to be a common migrant worker in Chiang Mai. Qin Zhao had never had contact with such people, and it was impossible for them to know her room so clearly.
Someone must have instructed him to hang the dead rat at her room's door.
The hotel staff had cleaned up the doorway for Qin Zhao and even offered to change her room, but Qin Zhao did not switch; she didn't mind if they came looking for her again.
