Peb txoj haujlwm yog laser txiav.Peb tsim txhua yam khoom siv hlau.SHENGRUI muab cov khoom lag luam zoo thiab kev pabcuam tomqab muag zoo.Yog tias koj muaj lus nug txog peb cov khoom, thov hu rau peb.Peb yuav muab kev daws teeb meem rau koj sai li sai tau.