Except for a few residual bricks found at No. 1 platform site, no city bricks have been found in Hushan Great Wall site. Hushan village and nearby villages have not removed City bricks from the Great Wall for civil housing construction. It can be inferred that there are very few bricks used for Hushan Great Wall.
Which assumption does the above speculation need to imply?
Mountain here is high and the slope is steep, so it is difficult to transport the city bricks in and out