Hello, thank you for your feedback. We have investigated this issue.
The reason the migration is stuck at 76% is that the migration process requires copying data volumes (such as Redis data). The system starts a data migration task on your dedicated server. However, the container image used for this task is pulled directly from Docker Hub. Since your server is located in Tencent Cloud Shanghai, the network in mainland China cannot connect to Docker Hub, causing the task to wait indefinitely for the image download.
This is an internal platform issue, not an error in your operation or configuration. We will fix the migration process to ensure that data migration tasks use domestic image mirrors on servers in mainland China. Once fixed, you will be able to complete the migration normally, and we will notify you here at that time.