Children's morning education machine has built-in memory and external TF card. If it is built-in, it doesn't have to be installed, but it must be installed externally. And the content inside can't be encrypted and copied. It's no use copying outside, and it's no use copying outside content into it. The manufacturer must provide the content. Zhicheng Kelaidi is the designer and content provider of the control board circuit board of early education machine.