Log on to the EIP console.
On the Elastic IP Address List page, click the region of the Elastic IP address to be released.
Next to the target EIP, click Unbind
In the Unbind Elastic IP Address dialog, click OK to confirm your operation.
Click Refresh on the upper-right corner. When the EIP address status changes to Available, it indicates that the EIP is successfully unbound.
If you want to release the EIP, click More > Release. The released EIP will be deleted from the list.