Chang'an Prefecture Bureau Office Building, Zhang Chengang had just finished dealing with a group brawl caused by a scramble for supplies when his phone rang.

Seeing the number, his face instantly turned serious.

The owner of this number was Hei Lang, an undercover agent he had placed with Xie Debiao. Hei Lang would not call directly unless it was something urgent.

Closing the office door, he answered the call, and Hei Lang's voice came through.