Qhov no yog ib qho chaw muag zaub uas tuaj yeem tso saib ntau dua 100 yam khoom siv kho vajtse.Nws tsis tsuas yog muaj qhov zoo nkauj zoo nkauj thiab cov qauv ruaj khov, tab sis kuj muaj kev sib dhos dawb, kev sib dhos ceev thiab sib dhos, thiab kev thauj mus los yooj yim.