When Bai Qing heard this familiar voice, a surprised and happy expression appeared on her face.
But soon, she heard the voice continue, "Just listen to me. There's no need to reply, and don't look at where I am. If you understand, blink your eyes."
Bai Qing quickly blinked her eyes.
"Very good. The office worker who was playing with his phone three meters away from you at four o'clock, and the university girl who was listening to music with her earphones next to him, they are all plainclothes police officers."
Bai Qing first blinked, then quickly blinked twice.