Can the hotel call a waiter at midnight?

* * The hotel can call a waiter at midnight. If guests encounter any problems that need help or service in the hotel room, they can contact the hotel front desk or room service center for help. If there is no staff on duty at the hotel front desk or room service center, guests can try to leave a message on the emergency contact number or card, or directly knock on the door or call other hotel staff for help. Guests should describe the problem in as much detail as possible so that hotel staff can better understand and solve their problems.