Hello, let me ask, does the ground handling belong to the airport or aviation?

Airport ground handling means signing a contract with the airport, as well as airline ground handling.

For example, China Southern Airlines is stationed at Changsha Huanghua Airport, and they are responsible for their own flights, so they have their own ground crew. Recruited by airlines. The ground handling of the airport is recruited by the airport.

Security check belongs to the airport. I hope I can help you.