 Foundation : For every square chi , apply two dan of earth ; on top of it lay a mixture of broken brick , tile and crushed stones , also two dan . For every five @-@ cun layer of earth , two men , standing face to face , should tamp six times with <unk> , each man pounding three times on a dent ; then tamp four times on each dent , two men again standing face to face , each pounding twice on the same dent ; then tamp two more times , each man pounding once . Following this , tamp the surface with <unk> or stamp with feet randomly to even out the surface . Every five @-@ cun layer of earth should be compressed to three cun ; every three @-@ cun layer of brick and stone to one and a half cun . 
