Turn on the TV with the TV remote control, click the "TV Channel" on the homepage with the set-top box remote control to enter the live broadcast page, select the "Online Education" column, and select the corresponding viewing channel between the channel numbers 30 1-33 1 according to the grade, course and textbook version. If you want to play back, click the small circle after the channel name in the "Online Education" column to play back according to the playing time.