This place was quite special; once inside, the mobile signal dropped to a single bar. This meant there was either no signal tower nearby or some other form of interference was at play.
After watching Feng Yan and his team go in, Cai Kai parked the van in an inconspicuous spot in the woods. A vehicle left on the curb would have been a dead giveaway that someone was here.
Cai Kai parked the van and immediately began checking the equipment inside. Using the signal scanner, he located the nearby base stations. After confirming the weak signal was a local problem, he started searching for other sources of interference.
While he hadn't brought much equipment, it was sufficient for detecting interference. He couldn't isolate the frequency band, but he did notice some anomalies in the electronic readouts that pointed to something peculiar.
