Hi @唱 郭 ,
Something here might be helpful:
Troubleshoot issues when you sign up for a new account in Azure portal
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/troubleshoot-azure-sign-up
Also check the Azure free account FAQ over here:
https://azure.microsoft.com/en-us/free/free-account-faq
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, thank you!
Best regards,
Leon