记者手记：鹰击长空，跨越时空的奋斗答卷

Core Points - The 11th Air Force Aviation Open Day and Changchun Airshow showcased advanced military aircraft, including the J-20 stealth fighter, highlighting China's aerospace achievements and technological advancements [1][3][6] Group 1: J-20 Fighter Jet - The J-20 is China's first domestically developed fifth-generation stealth fighter, which has filled a gap in the country's air stealth combat capabilities after over a decade of research and development [3] - The aircraft incorporates numerous next-generation technologies and has undergone extensive testing and optimization to achieve excellent flight performance [3] Group 2: Other Aircraft and Innovations - The Z-8L transport helicopter model was displayed, featuring a 40% increase in cargo space compared to its predecessor, enabling it to perform complex transport tasks under various conditions [4] - The AEF1200 and "Taihang" series engines were showcased, emphasizing the importance of advanced aviation engines as a reflection of national technological strength [4][6] Group 3: Cultural and Historical Significance - The event reflects the dedication and perseverance of Chinese aviation professionals over decades, from early aircraft development to modern advanced fighter jets [6] - The spirit of patriotism and commitment to national defense is evident, as employees honor the sacrifices of past heroes while striving to develop advanced military aircraft [6]