1. Download Jiyun Handan APP.
2. Click "+"in the upper right corner of the column and click "View All".
3. Subscribe to the "Classroom in the Air" column.
4. Watch the excellent courses in the "air classroom" column and "audio-visual" column in navigation.
If it is a new download, users can watch it directly in the "classroom in the air" column and download the navigation "audio-visual". Users can leave messages for course consultation and other interactions while watching the course.