C338 Hospital

Xiao Chen stuffed his phone into his pocket and started the car. He parked the car in the underground parking lot and got out of the car. With a dark expression, he made a call.

"Position."

It wasn't a human voice, but a series of knocks.

Xiao Chen tilted his head to the side to listen. After confirming the meaning of the knocking sound, he let out a cold laugh