If you buy the wrong book, a category is cancelled, or changed/deleted, we will communicate with the complete credit card or refund it in the campus store, if you follow the above guidelines in time. You can exchange books, and you can exchange your books for credits for the next semester.

Exchange should all mean exchanging books or returning books for money.

Credit is credit.

I checked the credit explanation. .

"Credit", that is, credit loan, refers to the loan issued by the borrower's reputation, and the borrower does not need to provide guarantee. Its characteristic is that the debtor can get a loan only by his own reputation without providing collateral or third-party guarantee, and the borrower's credit degree is cited as repayment guarantee.

My understanding is that you don't need credentials to change books next time.

Think about the specific situation yourself ~ ~ ~