Do you check in when you get on the bus, or do you sit in your seat and the ticket inspector asks for you?

Train ticket checking is the ticket checking before entering the platform from the waiting room. Generally, when the car is on fire, the station with a large flow of people does not check in. Tickets will be checked irregularly when the bus arrives at the seat, but different trains are different. Generally speaking, the flight attendant will ask you to change your ticket into a sleeper card, but the through train that doesn't stop at the passenger station generally doesn't change it.