Hi ​@Haizhen Sun, Celyn from Figma Community Support here.
Thanks for reaching out, and congratulations on your graduation!Â
Just a heads up that I've gone ahead and redacted the personal information included in your post to help protect your privacy.
While it isn't possible to transfer your Figma Education account to another account, there are a couple of ways you can move your work to your personal account.
If your work is stored in a project or team, you can review the requirements and steps for transferring a project or team to another account in this Help Center article: Transfer a project or team to a different account
If you need to move files between different Figma accounts, it isn't possible to do so using the standard Move file workflow. Instead, you can either:
Move one or more files into a project and then transfer the project to another account (both the sender and recipient must be on a paid plan), or
Save a copy of the file to your computer and import it into the other account.
Keep in mind that if the file uses styles or components from a team library, it won't continue to receive library updates after it's imported into a different account.