In order to ensure that you can enjoy meals on the plane, you need to book in advance and sell them according to the different time of each terminal. Some flights don't offer hot food sales because of their short flights.
On-board catering means that an airline may not provide on-board catering because of cost control, just like airlines in other countries where air transportation is the main mode of transportation.
However, just like these foreign airlines, the premise of doing this is that the market is fully competitive, the ticket price reaches the market equilibrium price, and it is clearly stated in advance that there is no catering on board, so as to remind passengers who need to eat in advance at the airport or prepare meals before boarding, and eat on time during the flight.
We eat at the table, and sitting at the table is the most basic etiquette we have to learn, so do you know? The following is what I arranged for you, I hope it will help