Chaw ua si aub yog cov khoom siv chaw ua si rau cov tswv tsiaj.Qhov chaw ua si dev ib txwm sib sau ua si sab nraum zoov, tab sis qhov tseeb uas tseem tuaj yeem teeb tsa hauv thaj chaw sab hauv.

Peb qhov chaw ua si dev nyob hauv tsev yog tus nqi qis tshaj, peb yog cov khoom siv tsiaj ua si qub nyob hauv Suav teb ntau dua 20 xyoo.

Peb siv cov khoom zoo rau txhua yam chaw ua si dev, lub sijhawm lav yog 8-10 xyoo.

Peb kuj tseem lees txais cov neeg siv daim duab rau nqe lus thiab xaj khoom.Qhov sijhawm xa khoom sai, kwv yees li 10 hnub rau tus qauv loj me me chaw ua si.