Bai Youwei glanced at Lu Yuwen on the bed and continued to inquire:
"What happened to him?"
Zhu Shu explained, "After Detective apprehended Yan Qingwen and Lin Kui, we sought to identify the real killer of the woman in Room 305, so we thoroughly searched this entire inn.
Lu Yuwen found a strange note in a vase on the staircase. He was on his way to inform us when he was attacked and injected with anaesthetic from behind!
According to Lu Yuwen, the attacker was very skilled. The anaesthetic worked incredibly fast, causing him to collapse upon contact. He's been unconscious ever since... The note was stolen and only half of it remained in his palm."
"This is the note..." Su Man took out the note and handed it to Bai Youwei, "Presumably the person was in a hurry to leave, worrying about being discovered, and did not manage to yank the rest of the note."
Bai Youwei took the note. It read in pencil:
[Surrounded·Solid Circle Back·Map Treasure Circle]