Duoyan Zheng calisthenics can't be screened because the screening method is wrong. The correct screen projection method is:

1. Use the same wifi to connect your mobile phone and TV, and keep them on the same network.

2. According to different mobile phone models, slide the mobile phone screen to bring up the control center page.

3. Click the mirror image of the screen, select the corresponding TV name, and click the link. After the successful projection, Duoyan Zheng calisthenics can be projected on the TV.