Cov lus ceeb toom ① cov plaub hau: tsheb ntxuav, txav lub tsheb los sis txhuam me ntsis ntawm cov khawb zoo, qhov kov tsis xav.
② Tsw Tsho Tsho: Cov tsho tiv thaiv sab saum toj yog puas ntsoog thiab tsis khawb ntawm daim tawv nqaij yog khawb hauv khawb ntiav. Kov kov
③ qauj khaus: xim raug pov tseg, khawb cov thawj khawb ntawm cov khawb nyhav.
④ kev khaus tob: Tshem tawm ntawm tsheb hlau phaj, polishing sib tsoo tsis raug kho.