Construction
The Chinese build suspension bridges of cast iron that are strong enough for vehicles to cross. See also 415 ce Materials.
TransportationThe earliest known depiction of a ship's rudder dates from about this time in China. See also 1180 ce Transportation.
Sometime before the start of the Roman Empire, some ships are fitted with a small triangular topsail above the mainsail. See also 500 bce Transportation.
The semilegendary Ko Yu invents the wheelbarrow, although this Chinese invention is also attributed to Jugo Lyang (Chu-Ko Liang) around 200 ce. See also 1220 ce Transportation.
