Talk about the high flight delay rate. Take an airline as an example. In most airports, the standard of flight delay is that the scheduled departure time 15 minutes later has not taken off normally. A flight delay of less than 2 hours is regarded as a general delay, more than 2 hours and less than 4 hours as a serious delay, and more than 4 hours as a vicious delay. According to this standard, the average daily flight normal rate of the company is around 70%. Of these 30% delayed flights, about 2% were delayed for more than 2 hours. Take 2000 flights a day as an example, 600 flights are delayed every day, of which about 12 flights are delayed for more than 2 hours. This data is really scary. The reasons for flight delay are generally composed of weather, control, failure, capacity and others. The weather reason is the best to understand, but this weather includes three aspects: the weather at the departure airport, the weather at the destination airport and the weather on the route, any of which may delay the flight. Sometimes the weather conditions at the departure airport and the destination airport are ok, but the flight is delayed because of the weather, just because of the bad weather on the route. So in this case, can't the plane fly around the bad area? Sometimes it just doesn't work. Although the sky overhead is so vast, it belongs to the air force. Civil aviation aircraft can only fly on planned routes and cannot fly out. The width of an air route is only 25 kilometers; . The reasons for failure account for such a high proportion. In fact, it is because the operating principle of safety first of airlines is different from that of cars. There's something wrong with the car. I must drive, but the plane can't. Not only did the engine break down, but the landing gear broke down and hit a bird. All problems found should be handled well, and there will never be a situation of making do with flying. Sometimes, because a light is broken and a monitor is out of order, it is necessary to check the flight schedule on the locomotive. It seems to be tossing, but it is actually to ensure safety.