Will flights from Luzhou to Ningbo be often delayed?

Not necessarily.

Usually flight delays are caused by delays caused by the airline itself and delays caused by reasons other than the airline itself, but these are not very frequent, so they are not often late.

If the flight is delayed by more than 4 hours but not more than 8 hours, you can apply for compensation. Usually, it is due to aircraft maintenance and flight deployment that the flight is delayed at the place of departure.