Hello minh tran,
Thanks for your question.
No, the $200 credit provided during the Azure free trial does not carry over after the 30-day trial period ends.
See details here:
https://azure.microsoft.com/en-us/free/free-account-faq/
Based on recommendation, you could decide to further experiment with various Azure services. You can view those in your learning path in the training module. https://learn.microsoft.com/en-us/training/azure/
Also please be careful and plan your spend.
Please let me know if you have further questions**
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