On July 26, 2020, China's independently developed large-scale fire/water rescue amphibious aircraft "Kun Long" AG600 successfully completed its first flight at sea near Qingdao, Shandong province, laying a foundation for the aircraft's training and verification of relevant performance in maritime test flights in the future. As one of the "big aircraft family" in China, the large amphibious aircraft AG600 is an urgent need for forest fire fighting and water rescue. It is the first large-scale special purpose civil aircraft developed, and it is an important aviation equipment urgently needed for the construction of the national emergency rescue system.

    Currently, AG600 aircraft has completed more than 360 hours of flight, accumulation and obtain a large amount of flight test data, combined with the ground test, the development team of the amphibious aircraft gas, water and other key design theory, design method, a verification method revised perfect, further breakthrough the key technology of amphibious aircraft design. The AG600, also known as Kun Long, is the world's largest amphibious aircraft under development. With cantilever upper single wing, front three retractable landing gear and single hull amphibious aircraft layout, four domestic turboprop 6 engines are selected. The length is 37 meters, the wingspan is 38.8 meters, the aircraft height is 12.1 meters (the external size is similar to Boeing 737), and the maximum take-off weight is 53.5 tons.