The Yellow River nine arrays constructed out of the most ancient millstones on water

In a scenic area of the Tai Hang living water valley near Wu'an city, Hebei Province lays the “Yellow River nine arrays”. It is constructed of a total of 527 ancient millstones from the Ming and Qing Dynasties (about 25 cm in thickness, about 60 cm in size and weighing about 150 Kg), which are placed on 527 circular columns, composing a 25mX25m, 70 cm deep square “Yellow River nine arrays”.It is the World’s only “Yellow River nine arrays”, constructed on water.