Thaum kawg mus txog tus neeg uas ua ntawv qib 200
Qhov kev xav tau tus nqi rau qib tom ntej yog hais txog 8400.Puas yog nws tseem ua tau kom tau txais cov ntsiab lus kev paub los ntawm kev mus ncig ntawm cov khoom siv nrog cov shumai sau thiab ib lub cev muaj zog?