It depends. Some overseas hotels pay cash at the front desk. If the hotel is prepaid, be sure to pay by credit card. The arrival time you said is 16 o'clock. Maybe this hotel needs a credit card guarantee. If you don't use credit card guarantee, the room will be kept until 16 at the latest. If you use the warranty, it will be kept overnight. Once the credit card is used as a guarantee, if you don't check in, you will also deduct the room fee.