Cov haujlwm tseem ceeb ntawm kev kho me me ntawmtshuab luam ntawv flexoyog:

① Rov qab kho qib kev teeb tsa, kho qhov sib txawv ntawm cov khoom tseem ceeb thiab cov khoom, thiab rov qab kho qhov tseeb ntawm cov khoom siv luam ntawv flexo.

② Kho lossis hloov cov khoom siv uas tsim nyog.

③ Khawb thiab zom cov khoom hnav thiab ua kom cov qhov txhab thiab cov burrs du.

④Ntxuav tag nrho cov khoom siv roj (xws li lub qhov muag roj, khob roj, pas dej roj, yeeb nkab roj, thiab lwm yam).

⑤Ntxuav, xyuas thiab kho cov khoom siv hluav taws xob.

6 Xyuas seb qhov txuas lossis qhov txuas uas tshem tau puas xoob lossis poob, thiab kho nws.

Kev kho.

Sau ib daim ntawv tshuaj xyuas kom meej thiab muab ib daim ntawv teev cov kev kho uas tau npaj tseg.