Hello WuYiFan,
The following service has been disabled.
You will have an opportunity to retrieve your data and content till Friday, November 19, 2021. For details, see the article, Information Center for Administrators, on My Oracle Support, and scroll to the bottom of the page to view the "Additional Termination Instructions for your Cloud Service".
You can continue to use OCI Always Free services as long as your account remains active. However, we will not be able to provide customer support and other benefits of paid services
