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Let me answer the first question: the shortage of airport runway resources is a worldwide problem, especially in the central airport (hub), and the allocation of runway resources is also a problem, because there is a lack of a value standard and allocation method that can be recognized by all parties concerned. The commonly used methods in the world are: drawing lots; Price method (including the highest price method and auction method); Grandfather method; Passenger plane priority/international flight priority principle; And other complicated management methods. Every existing method can solve some problems and has its advantages, but it also has shortcomings and irrationalities. The International Air Transport Association (IATA) also convenes representatives of major airports, airlines and aviation management agencies around the world to hold a flight schedule coordination meeting (SCCS) in June and June165438+1October every year to allocate runway resources.