When Huang Yunlai from Hainan province found a one-meter- long, torpedo-like device while fishing three years ago, he took photos of it and informed the province's National Security Bureau immediately.
It is now confirmed that the unmanned underwater machine, disguised to look like a torpedo, is an intelligence device capable of taking pictures with fiber-optic and satellite communication, state-run CCTV reported.
It was secretly placed in the water by a foreign country to obtain information on the Chinese navy fleet's operations at sea, it said.