1, Channel 4 of China Education Television, namely CETV-4 (classroom in the air). Its channel number is not fixed in the channel arrangement of TV programs in various provinces and cities. For example, the channel number of Sichuan Telecom IPTV China Education 4 is 2 1 1, but it was changed to 234 in Yunnan CETV 4. In addition, some provinces and cities have not yet opened the CETV-4 channel.

2. The best way to watch CETV-4 is to download the mobile phone application of CETV, then subscribe to the channel of CETV-4, or watch the programs of CETV-4 directly through the Internet. The method is to search "CETV" in Baidu to find its official website address, and then check it.