Why was the flight from Dalian to Xuzhou cancelled?

There are roughly several reasons: first, the weather suddenly turned bad, with heavy rain or typhoon, which is not conducive to the take-off of the plane; Second, the plane is broken, and every plane must undergo routine safety inspection before taking off. If a fault is found, it can't be eliminated immediately, and the number of passengers on the third flight is too small to meet the take-off cost. For the sake of economic benefits, the airline will notify the cancellation.

Fourth, airspace control, the airspace that a plane has to pass through is not allowed to pass for special reasons!