To delete a predefined tag for one cloud resource, perform the following steps:

Log in to the management console.
Under Management & Deployment, select Tag Management Service.
Set the resource search criteria.
For the search results, you can perform two operations: edit and view.
In the upper right corner of the search result list, click Edit.
(Optional) Set the key display list.
If the key of the tag to be deleted is not displayed in the list, perform the following steps:
1. Click in the upper right of the Search Result area.
2. Select the key of the tag to be deleted from the drop-down list.
  You are advised not to select more than 20 keys to display.
Locate the row containing the resource whose tag you want to delete and click .
After the resource tag is deleted, the resource cannot be managed based on the deleted tag.
(Optional) Click in the upper right of the Search Result area.
The cloud resource tag list is refreshed and the list refresh time is updated.

To delete predefined tags for multiple cloud resources, perform the following steps:

Exercise caution when deleting tags in batches.

After you delete a tag, it will be removed from all corresponding cloud resources and you will not be able to recover it.

Log in to the management console.
Under Management & Deployment, select Tag Management Service.
Set the resource search criteria.
Click Search.
Select the cloud resources whose tags you want to delete.
Click Manage Tag in the upper left corner of the tag list.
In the Edit Tag area of the displayed Manage Tag dialog box, click Delete in the Operation column to delete the tags.
Click OK.
After the resource tag is deleted, the resources cannot be managed based on the deleted tag.
(Optional) Click in the upper right of the Search Result area.
The cloud resource tag list is refreshed and the list refresh time is updated.

Deleting Resource Tags