The Nine-Turn Water Mill, said to be invented by Du Yu of the Jin Dynasty, was a marvel of mechanical ingenuit…
The Nine-Turn Water Mill, said to be invented by Du Yu of the Jin Dynasty, was a marvel of mechanical ingenuity. A long axle connected to three gears powered nine stone mills, grinding grain with the force of flowing water. This clever design became known as the Nine-Turn Water Mill, a testament to the early mastery of hydraulic engineering.