C264 Plotting and Then Acting

Knowing that the other party would arrive with a drug delivery vehicle at 5 o'clock, Zhang Yunfeng stayed at the top of the water tower without moving. In the past two hours, these people rarely used the walkie-talkie to communicate with each other, and were basically all in a state of absolute silence. At 4: 40 PM, a voice came from the walkie-talkie, saying: "Be alert