What is the establishment of the school's recruitment into the air traffic control bureau?

Establishment of civil aviation system.

After the school was recruited into the air traffic control bureau, the employees got the labor contract, not the employment contract of the institution. So it does not belong to the establishment of public institutions in the true sense. However, because the air traffic control bureau belongs to the civil aviation system, these employees belong to the civil aviation system and have high stability, which can be called civil aviation system establishment.