The 'Kunlong' rose with the same wind on a single day, soaring up ninety thousand miles. China's large special aircraft opens a new chapter! On April 20th, China's first large-scale amphibious aircraft AG600 "Kunlong" independently developed in accordance with China's civil aviation airworthiness regulations obtained the model certificate issued by the Civil Aviation Administration of China, marking that the world's largest civilian amphibious aircraft with takeoff weight has passed strict testing and verification, and the development has achieved complete success, obtaining the market "access certificate". From formally submitting the application for the model certificate in 2012 to achieving the first land flight in Zhuhai, Guangdong in 2017; From completing the first water flight in Jingmen, Hubei in 2018 to successfully achieving the first sea flight in Qingdao, Shandong in 2020; From possessing the ability to carry out firefighting tasks in 2023 to successfully obtaining the model certificate in 2025... The model certificate is not only a paper certificate, but also the answer sheet of China's aviation personnel's commitment to serving the country. This is a charge towards the peak of technological innovation - "AG600 is a ship that can fly and an airplane that can swim The chief designer of the AG600 aircraft model, Huang Lingcai, said that in addition to possessing all the functional characteristics of a land-based aircraft, it also needs to have water-based functions and performance. In order to meet the overall design requirements of the AG600 aircraft, the development team extensively adopted system engineering design methods and comprehensive optimization design techniques for aerodynamic layout design. We have successively broken through more than 20 key technologies in the field of amphibious aircraft, such as high anti wave hull design and complex hull manufacturing, filling the gaps in China's aerodynamic fusion design, complex hull manufacturing, and water flight testing, and building a large-scale amphibious aircraft aviation technology system. This is an "aerospace bodyguard" designed for the safety of people's lives - the AG600 aircraft is a multi-purpose large-scale aviation equipment platform with rich application scenarios. It can operate on plains, grasslands, hills, and plateaus to meet various aviation forest firefighting scenarios in China. It can not only perform firefighting tasks in plains, hills, and high-altitude areas, but also adapt to multi scenario tasks such as aerial command, personnel and material transportation, communication relay, etc., and meet the rescue needs of multiple disasters. At the same time, the AG600 aircraft has also filled the gap in China's long-distance aviation rescue capabilities in the field of emergency rescue. This is a vivid practice of leveraging the advantages of the new national system - the AG600 development team involves 22 provincial-level administrative regions, 296 enterprises and institutions, and 16 universities across the country, innovatively forming the core technology system of China's large amphibious aircraft, constructing a "small core, large cooperation" development model, establishing a system for the design, production, system matching, test flight, and support services of large amphibious aircraft, enabling China to have the technical and industrial capabilities to independently develop large amphibious aircraft, and achieving a historic leap in the development of China's civil aviation industry in the field of large special purpose aircraft. Riding the wind and breaking the waves, the dream of the sea and sky comes true. Let's look forward to the AG600 aircraft flapping its wings and soaring high at the intersection of water and sky, guarding the lives and health of the people on mountains, rivers, forests, and seas. (New Society)