We need (5 steps) to operate how to screen TV on the national primary and secondary school network cloud platform. The model of this demonstration is Huawei Mate40pro；; System: HarmonyOS System 2; The following are the detailed steps:

1 Search National Education Platform

Open the mobile browser and search official website, the national primary and secondary school network cloud platform;

1. Search for National Education Platform 2 and select courses to download.

Choose the stage grade you want to study, taking the first grade of primary school as an example, click on the courses you have not studied and download them;

2. Select course download 3. Click TV.

As shown in the figure, click the "TV" button above the video;

3. Click TV4 to start screen projection.

Start the screen projection plug-in;

4. Start the screen projection. 5. The screen projection is successful

Select the screen projection device, and the screen projection is successful.

5. Successful screen projection