London News photo caption: Showing the high-level conduit that carries water over the city wall at Lanchow [Lanzhou] to fields beyond: A general view of the three giant water-wheels (with another smaller one visible on the left) operated only at high water seasons.
Source of Descriptive Information
The Illustrated London News. (December 22, 1934). On ""China's Sorrow"": Giant Wooden Water - Wheels at Lanchow [Lanzhou] - Picturesque Irrigation Machinery on the Yellow River.