Core Viewpoint - China Southern Airlines has successfully implemented a dual-city collaborative aircraft engine replacement operation, enhancing its maintenance capabilities and supporting the construction of the Hainan Free Trade Port [1][2] Group 1: Operational Efficiency - The engine replacement work at Haikou and Sanya bases was completed efficiently, reducing the conventional aircraft downtime during troubleshooting [1] - The operation involved two specialized maintenance teams working together across regions, showcasing the effectiveness of the company's "Four Modernizations" reform [1][2] Group 2: Technical and Process Improvements - The engine replacement process is likened to a "heart transplant" for aircraft, requiring precise adaptation of over 30,000 components, which demands high technical standards and process control [1] - The integration of resources and unified scheduling between the two bases has improved the rapid response capability for complex maintenance tasks [2] Group 3: Strategic Impact - The collaborative maintenance not only ensured the safety and efficiency of air transport but also contributed to the development of Hainan as an international aviation hub [2]