An exhibitor from Shiji Langduo Technology Co in Taiyuan introduces the electronic blackboard to visitors at the exhibition area of the CNCC on Oct 20. The product avoids chalk dust by substituting an electronic screen for the traditional blackboard. The texts written on the e-board can be saved instantaneously, facilitating note-taking and revision for students. Moreover, the e-board can play videos and display slides. [Photo/news.cn]