Chapter 544 - 532: No Such Person Exists
Brian and Paul had no choice but to join the tracking as well, because even if Yang Yi and Anton took turns at surveillance, there was a considerable risk of being detected.
Five people, four vehicles, and after two vehicle changes, they at last managed to tail Park Ji-yi to the exterior of an innocuous-looking house.
Park Ji-yi drove into the house, while Yang Yi and the others immediately spread out to commence the final stage.
Just tracking was meaningless, the crux was to know who Park Ji-yi was meeting and what was being said.
Yang Yi and Xiao Ran set up a microwave eavesdropping device, while Brian and Paul were operating a laser surveillance device.
Sound waves could create a faint resonance effect on glass or metal objects, which in turn could reflect microwaves. Yang Yi controlled a directional microwave emitter aimed at the windowpane; if there was speaking inside, the device could capture and reconstruct the content of the conversation.
The principle of the laser eavesdropping device was similar, only switching microwaves with laser. When the laser shone on the window, the sound waves from the conversation caused minuscule vibrations in the glass. Once the laser reflected back and was received and amplified, a clear conversation could be obtained.
"Thanks for your hard work."
"You’re too polite."
Yang Yi was the first to receive the audio signal, and immediately said into the walkie-talkie, "Target is in the house on the sunny side, second window to the left, engaged in conversation."
The two distant eavesdropping devices were to prevent equipment failure or poor eavesdropping performance, so as soon as Yang Yi located the target, he immediately informed Brian to eavesdrop together.