"Hello, please go ahead."

"Hello, I will kill someone in 1 hour. The victim's name is Cai Yifan, male, 15 years old, a student at Binhai No. 19 High School. Please prepare to dispatch officers."

"I heard you. May I ask where the action will take place? Additionally, please provide your name and ID number."

"...926."

"What? 926? Is that the address?"

"Beep...beep...beep..."

The dispatcher quickly reported to the leader, who instructed: "Notify the technical department to locate the call just now and contact the administration office of the No. 19 High School to verify the situation."

10 minutes later...

"The call was too short to be tracked, and the calling card number is from a 2012 Shenzhou Xing card, unregistered. There is a student named Cai Yifan at the No. 19 High School who didn't come to class today and doesn't have a mobile phone."

"Notify the local police station to find this student as soon as possible and make sure to catch this caller."