When does online hotel check-out usually expire?

Three months. According to the announcement issued by Ctrip, comments can be made within 3 months from the second day of check-in to departure, but the comments will not take effect until after departure. Therefore, the evaluation of online hotels expired after 3 months of check-out. There is no charge for booking a hotel online, just register an account. You can also enjoy a lower price than the hotel front desk.