Large portions, particularly in arid regions, were constructed using compacted soil, or rammed earth ... Wall's significance as "a cultural symbol of China and Chinese civilization," as noted ...

Rammed-earth wall building may be an ancient home-construction ... With traditional wood homes, Krayenhoff noted, "the temperature would drop within a few hours". Local architect Bruce Haden ...

Rammed earth homes are built by putting in place the form of the house, which is usually a plywood structure that provides the outline of a wall. A mix of soils is then rammed into the walls ...