The Great Wall was built with large amount of processed granite strips on the basis. But that does not mean all the places hosting the Great Wall could furnish such stone materials. We can hardly imagine how the laborers collected and shipped the materials in those ages of backward productive forces. Where will we seek the stone fields for constructing the Great Wall? This has become a knot puzzling Great Wall experts all these years.

We are now confronted with a site of stone fields. There were left finished granites and semi-finished stone materials. One piece of stone material was chiseled with an opening for further processing. The discovery of the stone powder dish showed that ancient people had applied explosives in cutting into mountains. The opposite naked stone cliff was a section plane showing how stone materials were collected…. The discovered stone field of the Residual Great Wall has translated a historical mystery on the construction of the 10,000-li Great Wall.