When Tao Xiangli started collecting some old oil barrels and a few tools from a second-hand market no one in their wildest dreams expected he would create a...
The incredible underwater feat is fully functional - with a periscope, depth control tanks, electric motors, manometer and two propellers.
The amateur inventor, who works as a labourer during the day, has spent 30,000 yuan ($4,385) on his creation.
It has taken two years for Xiangli to finish the vessel but he predicts it can reach a depth of 10 metres in water.
Xiangli applies the finishing touches to the hatch of the conning tower.
Now it's time to test the water...
Away we go! The sub successfully makes its maiden voyage on a lake on the outskirts of Beijing.