National Geographic : 1942 Feb
Coolies on a Work Barge String a Rope "Cradle" to Hold Packs of Kaoliang Stalks When the section is completed and filled, it will be moved to deep water and sunk to close a gap in the dike. Concrete revetments areimpossible along the Hwang Ho. No sand is available within a reasonable distance. Kaoliang, willow stakes, hemp rope, and stone are China's traditional weapons against flood.