 One thousand years ago, when Europe was still in the dark ages, China was at the forefront of technology. We unveil the remarkable story of how China created a myriad of ingenious devices including cosmic machines able to collect data on the stars, hydraulic hammers, water-controlled clocks, and mass production plants powered by water. We visit a reconstruction of an ancient Chinese iron furnace to unravel how the Chinese created a forty-ton iron artifact five centuries before the West discovered cast-iron technology. Meet the leading clay expert Professor Ye Hongming who has spent a lifetime seeking to discover the secrets of how the ancient Chinese created their vast terracotta army.