You can delete an idle private zone, which is a zone that is not associated with any VPCs. To delete private zones that are associated with VPCs, you must first disassociate the zones from the corresponding VPCs.
To delete an idle private zone, follow these steps:
Log on to the Alibaba Cloud DNS console. In the left-side navigation pane, click Zone list under PrivateZone.
On the Zone list page, find the private zone that you want to delete, and click Delete in the Actions column.
In the Remove Zone Warning dialog box, click OK.