The hardware cost is low. Small intelligent tablet, also known as small intelligent learning tablet, is mainly positioned as learning machine and early teaching machine, which is suitable for children aged 3- 18, because of its low hardware cost and low price. Xiao Di is Baidu's artificial intelligence assistant, and has built-in DuerOS interactive artificial intelligence system, which allows users to operate more than 800 functions, such as audio-visual entertainment, information inquiry, life service and travel road conditions. An interactive way of talking in natural language. At the same time, with the help of Baidu AI ability, Xiao Di keeps learning and evolving, understands users' preferences and habits, and becomes more and more "smart".