What if the credit card debtor can't repay the loan abroad?

This is where you are wrong. Credit cards need to be repaid on time. Even if it is too late to go abroad, you should ask a member or friend to help you return it first. If it is overdue, the bank will contact your family. You can call to complain about your attitude and try to return it. Otherwise, the bank will sue you, restrict you from going abroad in the future, and bear legal responsibility.