Fisherman helps expose foreign spy ring after hauling up underwater device

China's Ministry of State Security (MSS) on Wednesday revealed a case in which a local fisherman helped uncover and thwart a foreign espionage operation by retrieving a suspicious underwater surveillance device during routine fishing, CCTV News reported.
According to the MSS, the fisherman, surnamed Chen, discovered a strangely shaped device while fishing.
Alerted by its unusual appearance and recalling a previous case in which a fisherman from a neighboring village had also retrieved a similarly peculiar device, which was later confirmed to be used for stealing classified information, Chen promptly called the national security hotline and returned to port with the device.
Shortly after the device was retrieved from the water, a foreign agency monitoring its movement received an emergency alert indicating a drastic location change. This confirmed that the recovered device was indeed a new type of underwater surveillance equipment deployed by a foreign country in China's territorial waters.
Judging by its speed and trajectory, the agency concluded the device had likely been retrieved and was en route to a Chinese port. It then dispatched a long-term operative in China, a Chinese national surnamed Liu, to locate the device.
National security officers stated that upon receiving Chen's report, while maintaining close communication with the fisherman and monitoring the ship's return trajectory, they collaborated with police, coast guard, and relevant local departments.
Concurrently, security officers tracked the movements of suspect Liu. Through coordinated intelligence efforts with other agencies, they deliberately leaked news of "Chen retrieving a spy device."
After the boat docked, Liu attempted posed as a novelty collector interested in purchasing the device but was rebuffed by Chen.
Liu was already under surveillance by national security officers, and every move he made was tracked until his eventual arrest, CCTV News reported.
Security officers said Liu was ordered to offer a large sum of money in exchange for the device and smuggle it out of the country if possible.
Following these leads, the MSS dismantled a long-running foreign spy network operating inside China and took legal action against those involved.
Chen has since received official recognition and was commended for his contribution.