1. Take Huawei p 10 mobile phone as an example. First open the phone interface, and then click the "cut" icon.

2. Click the "Start Creation" button in the middle of the main interface of clipping.

3. In the open interface, select a vertical video.

4. Then click the Add to Project button.

5. In the interface that appears, slide your finger to the right.

6. In the interface that appears, click the "Proportion" option below.

7. In the interface that appears, select a landscape scale.

8. In the interface that appears, you can zoom with two fingers, and then click the "Export" button in the upper right corner.

9. At this time, the interface shows that you are exporting.

10. Finally, click the "Finish and Keep Draft" button.