How to delete local files without deleting Mi cloud files?

Function Introduction:
1. Enter the album page to select the photo folder of local photos/videos to be deleted, click the three dots in the upper right corner, select "Delete local backup Photos/videos", and check the photos/videos to be deleted (all options are available) to confirm deletion.
2. If the local photo/video has not been synchronized to the cloud, or the local photo/video has been synchronized to the cloud before but the local photo/video has been deleted, or the photos/video synchronized from other terminals has not downloaded the original file, it will not be displayed when checked.
3. If it is directly deleted in the ordinary way, it will be deleted together with the Mi cloud.
4. After deleting the local area, enter into the album and see the thumbnail, view the photos/videos need to be downloaded -> more -> download the original file.
5. Videos, faces, and photos/videos from other albums don't have optional.
New system operation mode:
After entering the gallery, click the three dots in the upper right corner to open only the local album and delete it.