This experiment demonstrates how to implement cross-zone disaster recovery by using Alibaba Cloud Hybrid Backup Recovery (HBR). HBR is a fully-managed online backup service that allows you to back up data to the cloud in a convenient, efficient, and secure manner. You can use HBR to back up data to a cloud vault from Elastic Computing Service (ECS) instances, ECS databases, ECS files, Apsara File Storage NAS file systems, NAS clusters, Object Storage Service (OSS) buckets, and self-managed data centers that store files, databases, virtual machines (VMs), and large scale NAS file systems. You can also implement disaster recovery and archive data based on the archive policies that you configure for the preceding resources.