Story of astonishingly large "floating fortresses" built by the ancient Chinese to cruise down river as a kind of "shock and awe" death-star platform.
Computer models shown of square barge-like Early Han Dynasty warship, Castle or Tower Ships (Lou Chuan) of the Han Dynasty, paddle wheel warships are explored, and Sung dynasty mine ships.
Then an investigation and demonstration of ancient Chinese anti-boat mines, nearly 1000 years before similarily effective ones were built and used in the West.
interviews with Dr. Stephen Davies, Dr. John Bevan, and Richard Windley, who re-creates the ancient Chinese mine technology, exploding some in a tank.
