Can the travel registration team refund the single fee for one day?

Of course. There is a certain time limit for refund after the tour group signs up. You can apply for a refund within 0/5 days after registration. Therefore, the team can also refund the single-person fee for one-day registration, but it cannot be refunded in full. After all, it is your own refund, and you have to bear most of the responsibility. On the last day before the tour group leaves, no matter whether it leaves or not, you can't apply for a refund.