The wiretapping device that Han Rui had planted this time was given to him by Xia Xibei.
It turned out that this device was even more advanced than the one he had on hand!
Han Rui was, after all, a special forces soldier and would bring these gadgets onto his missions often.
These devices were incredibly miniaturized, with the smallest one being the size of a fingernail.
Furthermore, these devices were the most advanced ones he could get his hands on.
With such advanced devices, he could avoid being detected by others.
However, his opponents weren't idiots.
After all, the business they were in was shady, and they couldn't let others know what they were up to through these channels.
Hence, there were plenty of anti-bugging tools in every location.
If they found the presence of devices, they would track down the culprit.
That was why Han Rui hadn't dared to place his own devices at that location before.