Cov ntawv kub, feem ntau yog tib xim ntawm cov ntawv kub, tuaj yeem muab faib ua ntau hom, xws li: cov ntawv kub, kua nplaum kub, zaj duab xis kub, tawv kub, daim ntaub kub thiab lwm yam. Tab sis txawm li cas los xij, subdivide cia thiab tuaj yeem faib ua peb hom.
Ua ntej: nruj hauv qab (haum rau cov lus kub me me)
Thib ob: nruab nrab (nquag rau txhua hnub, tsis yog thaj chaw me me)
Thib peb: ntoo thuv hauv qab (haum rau qhov chaw kub loj hauv chav)
Hauv cov kub kub dhau los ua cov khoom muag, yuav tsum xub muab cov xim zoo, qhov kub thib ob zoo tom qab siv lub ntsej muag, xyuas seb kub lub hmoov kub yuav poob.
Tshwj xeeb tshaj yog tom qab cov roj, dub-hauv qab ntawv, ntev li ntev tau me ntsis ntawm kub hmoov, yuav ua rau cov ntawv dub yuav muaj kub hmoov ntawm tag nrho cov sab
Thaum kawg, nws ua rau muaj kev rau txim loj.