Raws li cov cim "safety signs and their guidelines" (gb2894-2008), kev qhia txog kev nyab xeeb: cov cim qhia siv los qhia txog cov kev qhia txog kev nyab xeeb, muaj cov duab cim, xim xim, cov duab geometric (ciam teb) lossis ntawv.
Cov kev qhia muaj kev ruaj ntseg yog cov cim qhia tias ceeb toom cov neeg ua haujlwm ntawm cov xwm txheej phem hauv chaw ua haujlwm lossis ib puag ncig ib puag ncig thiab coj cov neeg los mus ua haujlwm tsim nyog. Cov paib qhia tau hais rau cov neeg ua haujlwm kom tsis txhob muaj kev phom sij, kom tsis txhob raug xwm txheej; Thaum muaj xwm txheej tshwm sim, muaj peev xwm qhia cov neeg kom dim tau sai npaum li sai tau, los yog qhia kom tib neeg siv txoj kev txhim kho, zoo thiab ua tau zoo kom txhob raug mob. Tsuas yog cov cwj pwm ntawm kev nyab xeeb yuav tsum ua raws nraim li cov ntsiab lus ceeb toom, tab sis kuj qhov chaw yuav tsum yog qhov tseeb thiab tsim nyog, txwv tsis pub nws ua kom yooj yim rau kev ua si rau nws lub luag haujlwm ceeb toom.
