A 2,500-year-old Chinese sword discovered in 1965 remains razor-sharp and pristine today, seemingly defying the natural laws ...

By 209 BCE the Chinese army had 50,000 crossbowmen who fought with mass-produced bronze weapons. These crossbows, which were an important weapon in war until rifles were invented, were usually mounted ...

Narrator: Over three and a half thousand years ago ancient China was ruled ... Narrator: During the Shang period, bronze was the most important metal, weapons, armour and tools were all made ...

Narrator: Over three and a half thousand years ago ancient China was ruled ... Narrator: During the Shang period, bronze was the most important metal, weapons, armour and tools were all made ...