1. The delay is within one hour ... There is nothing to say, just the broadcast in the departure hall.

2. the delay time is between one hour and four hours ... generally speaking, there is nothing to say, that is to say, passengers can't ask for any compensation, but if the delay is between three and four hours, the airlines concerned will provide meals or food stamps.

3. If the delay is 6 hours or more, the duty manager of the airline concerned will call all passengers on the flight, explain the reasons and apologize, distribute notices, arrange overnight accommodation, refund tickets or transfer to other flights.