1. First, insert the smart card into the card slot ((unable to send it out), the curtain will be automatically lowered, and all multimedia devices such as computer, projector and power amplifier will be automatically turned on.

2. Secondly, the computer enters the system selection interface, selects the key to select the system, and presses Enter to enter the selected operating system to start the class.

3. When class is over, pull out the smart card, and the system will automatically turn off all multimedia devices. Finally, close the keyboard drawer and lock it automatically with a click.