Hebei nanhao information industry company limited. is a high technology company focus on researching, developing and manufacturing educational instruments including interactive whiteboards,optical mark readers (omr scanner), online scoring systems and related software in china. our main products are: interactive whiteboard, omr(optical mark reader),omr info-forms, epc(low cost computer) , nc(network computer) and software products.it is the largest manufacturer of optical mark readers in china