Hi there!
The migration of the NMS is a complex process. If the old equipment is not used, the following steps are involved:

For details, click the following link to download the Migration Guide based on the actual scenario:
https://support.huawei.com/enterprise/en/network-management-control-analysis/network-cloud-engine-pid-22752497?category=release-documents&subcategory=documents-on-topics
Thanks!