Cov txheej txheem ntws ntawm cov nplais tsis-siv cov nplaum yog raws li hauv qab no;
1. Kev xaiv cov khoom siv: kev xaiv ntawm cov ntaub ntawv tsis-ntaub, xim, tuab, ntau, zoo
2, dhau los ntawm cov pos hniav tshuab lo kua nplaum: tom qab kho qhov kub thiab txias, kua nplaum tuab tso cov ntawv, cov khoom siv tshuab nrawm;
3. Sab sab nraud ntawm tus thev naus laus zis thiab lub kauj tub sab sib dhos ua ke;
