Txij li thaum tsim, Uchampak lub hom phiaj los muab cov kev daws teeb meem zoo tshaj plaws rau peb cov neeg siv khoom. Peb tau tsim peb tus kheej R <000000>D chaw tsim khoom thiab tsim khoom. Peb nruj me ntsis ua raws li tus txheej txheem tswj kev ua tau zoo los xyuas kom meej tias peb cov khoom ua tau raws li lossis tshaj peb cov neeg siv khoom xav tau. Tsis tas li ntawd, peb muab kev pab cuam tom qab muag rau cov neeg siv khoom thoob plaws ntiaj teb. Cov neeg siv khoom xav paub ntau ntxiv txog peb cov khoom tshiab kraft ripple khob lossis peb lub tuam txhab, tsuas yog tiv tauj peb.
Cov tuam txhab no tau tsim kev sib cuag nrog cov nroog nyob ze kom muab cov khoom tsis yog CMA piav qhia tias cov khib nyiab rov ua dua. Txawm li cas los xij, cov chaw tsim khoom tau hais tias nws yuav tsis ua haujlwm ib leeg vim tias kev siv cov yas, tsoomfwv daim ntawv ceeb toom feem ntau yog hais txog cov hnab yas, ib lub hnab Siv cov ntawv qhwv yas thiab khob. Lawv xav tau ntau tus neeg tsim khoom thiab cov neeg siv khoom. Txheej yasFMCG (ceev-