Hello, if you want to download the image you can following the step to try.
1. login the cascading controller node with putty and import environment source;
2. Create a new directory to storage the image which you will download later;
mkdir -p /opt/HUAWEI/image/temp
chown fsp:fsp /opt/HUAWEI/image/temp
3. Find the image ID from the ServiceOM portal which has existed;
4. using the command to download it;
glance image-download <image_ID> --file /opt/HUAWEI/image/temp/<image_name>.qcow2 -progress
5. When it has finished you can be using WinSCP tools to download it and register to another region.
Thanks!