Core Viewpoint - The AG600 "Kunlong" amphibious aircraft is the world's largest civil amphibious aircraft, essential for national emergency rescue systems, and has faced numerous challenges since its inception in 2009 until its expected certification in 2025 [1][2]. Development Journey - The AG600 project was officially launched in 2009, with the first flight of the technology verification aircraft occurring in 2017. The aircraft is expected to receive its type certificate and production license by 2025 [1][2]. - The design team, led by chief designer Huang Lingcai, faced significant challenges due to a lack of existing technology and experience in amphibious aircraft design, with many team members being recent graduates [3][4]. Technical Innovations - The AG600 has overcome 110 key technologies for large amphibious aircraft, including 18 foundational and common technologies [4]. - The aircraft's hull is designed in a "V" shape to enhance stability on water, and it can achieve speeds exceeding 80 knots (approximately 148 km/h) while operating on water [4]. - The main flight control system is a significant advancement, being the first of its kind applied to a civil large aircraft in China, enhancing the industry's capabilities in complex software and hardware development [6]. Collaborative Efforts - The project involved collaboration among 296 enterprises and 16 universities, marking a significant achievement in China's civil aviation sector [5]. - Quality control was emphasized, with representatives from the company stationed at key suppliers to ensure traceability and reliability of components, which number over 200,000 [5]. Testing and Validation - The testing phase is critical and involves challenging conditions, with the team conducting extensive trials across various locations to ensure compliance with airworthiness requirements [7][8]. - The AG600 has been tested under extreme weather conditions, including temperatures as low as -40 degrees Celsius, to validate the performance of its hydraulic and fuel systems [7][8]. Future Aspirations - The aircraft has proven effective in emergency rescue operations, and the next goal is to enhance its durability and expand its usage across various applications [8].