During SARS, primary and secondary schools are on holiday, and students should study at home. With the Municipal Education Commission as the main body, Beijing TV Station, Beijing People's Broadcasting Station and other relevant departments and units jointly set up an "air classroom" to provide systematic and high-quality teaching guidance for more primary and secondary school students through various media.

The air classroom system can run stably on the Internet, private network, education metropolitan area network and satellite network. Moreover, the air classroom adopts a mature and leading distributed architecture, which ensures that the system has strong concurrency and can support ten thousand people to attend classes at the same time.