Book a hotel on Ctrip and pay in full, but can I get a refund if I check out early?

It depends on the hotel you choose. Some need to be paid in advance, and some can be paid in cash at the store. Some hotels need to pay a deposit, and if they don't go, they need to pay a certain fee. Some hotels can cancel in full a few days in advance, and some don't need a deposit. This is the rule of every hotel. You need to read the rules when you make a reservation.