The difference between them is that business class R is a regular class, and business class Z is a special class with code * * *.

economy class passengers can only wait in the waiting hall. Passengers with business class tickets can use the airport waiting room for free and do a free SPA while waiting. First class passengers can enjoy VIP exclusive services. There are private rooms, and the facilities inside are no different from those in five-star hotels. You can also drink expensive champagne and all kinds of instant cooking foods from all over the world for free.

Economy class passengers have to queue up for boarding, while business class and first class passengers can enjoy priority boarding. Attendants like Air India will personally escort first class passengers to the check-in gate in the airport waiting room and help with luggage.

economy class seats can only be seated, while business class and first class seats can lie flat, or recline or recline. Some airlines provide beds for first class and set up special bathrooms for first class guests.