Nanhao Group, is a professional expert specializing in manufacturing optical mark reader (omr scanner), omr forms, revelant software, interactive whiteboard ,online scoring system, etc. It was established in 1995,and has been the leading manufacturer in China. All of our product have the certification of CE, FCC, ROHS, C-tick and ISO9001. Over 70% schools in China are using our products. With high quality and reasonable price,our products has been exported to more than 38 countries including England , America, Spain, Africa, etc.