Three or Four People

He pulled the bag half open, and the student looked very nervous. His hand held something, but he did not pull it out of the bag.

A fruit knife?

Xiao Gu saw something reflective from the opening, but it was unclear whether it was a mirror or a knife. The bus started moving, and Xiao Gu went back to his seat. His eyelid kept twitching—he was feeling anxious. The rain outside continued to pour, and it was so heavy that he was unable to see the buildings that lined the road. Inside the bus, it was so quiet. No one spoke; it was a strange atmosphere.

Every one of the passengers is acting weirdly.

Xiao Gu leaned his body against the car window. The doctor that was across the aisle from him kept glancing his way with an unreadable smile on his face. It felt like he had found an interesting piece of art.