In order to facilitate the organization of transportation and production, each flight has a different number according to certain rules, which is easy to distinguish and manage. This number is called flight number.
According to the flight number, you can quickly know the execution company, flight location and direction of the flight, which is very convenient for management and passengers. Moreover, these unwritten rules originated in the early days of civil aviation development, when flights were mainly undertaken by airlines directly under the Civil Aviation Administration, and the arrangement of flight tasks by region made flight numbers very regular. With the development of local airlines, the reorganization of civil aviation enterprises, the sharing of codes, the overlapping of flight areas, and the confusion of flight numbers, the rules are no longer strictly followed.