民航局：将启用M503航线W121衔接线

Core Viewpoint - The Civil Aviation Administration of China announced the implementation of the M503 air route W121 connector to optimize airspace and improve operational efficiency starting from July 6 [1] Group 1 - The introduction of the M503 air route is aimed at enhancing the airspace environment for civil aviation [1] - The initiative is part of broader efforts to increase operational efficiency within the aviation sector [1]