Core Viewpoint - The U.S. President Donald Trump has commissioned L3Harris Technologies Inc. to modify a used Boeing 747 aircraft for temporary presidential use due to ongoing delays in Boeing's plan to replace Air Force One [1] Group 1: Company Actions - L3Harris Technologies Inc. will undertake the modification of a Boeing 747 that was previously used by the Qatari government [1] - The modified aircraft is expected to be operational by the fall [1] Group 2: Industry Context - The modification of the aircraft comes in response to delays in Boeing's replacement plan for Air Force One [1]

Group 1 - US lawmakers have warned Ryanair against purchasing Chinese-made aircraft due to alleged security concerns, specifically regarding the C919 aircraft from COMAC [1][2] - Congressman Raja Krishnamoorthi, a leader in the US House "China Committee," expressed that US and European airlines should not consider buying planes from China [1] - Ryanair's CEO Michael O'Leary previously indicated interest in purchasing the C919 if the price is right, signaling a potential shift in sourcing aircraft beyond Boeing and Airbus [1][2] Group 2 - Ryanair, established in 1985, is the largest low-cost airline in Europe, operating over 1,600 routes and having 76 base hubs globally [2] - The US Department of Defense has previously placed COMAC and eight other Chinese companies on a blacklist for alleged ties to the Chinese military [2] - The Chinese Ministry of Commerce criticized the US actions as lacking a basis in rules and fairness, arguing that such measures disrupt international financial market order [2]

智通财经4月29日电，俄罗斯总统普京在伏尔加格勒与白俄罗斯总统卢卡申科举行了单独会晤。在会晤 中，双方就进一步发展和扩大在飞机制造及无人机制造等领域的工业合作进行了讨论。普京表示，俄罗 斯已准备好与白俄罗斯共同建立联合飞机工厂和无人机系统实验室，并就飞机制造达成相关协议。普京 还表示，俄白两国的经济合作成果显著。 普京与卢卡申科举行会晤 将扩大在飞机制造等领域合作 ...

Core Viewpoint - The AG600 "Kunlong," China's first domestically developed large amphibious aircraft, has received a type certificate from the Civil Aviation Administration of China, marking a significant milestone in the country's aviation industry and enabling its entry into the market [1]. Group 1: Development Milestones - The AG600 project began with the application for a type certificate in 2012, achieving various flight milestones including land, water, and sea trials from 2017 to 2023, culminating in the successful acquisition of the type certificate in 2025 [1]. - The aircraft is recognized as the world's largest civil amphibious aircraft, having passed rigorous testing and validation processes [1]. Group 2: Technological Innovations - The development team utilized system engineering design methods and aerodynamic optimization techniques, overcoming over 20 key technological challenges in the field of amphibious aircraft, thus filling gaps in China's capabilities in this area [2]. - The AG600 integrates both land and water functionalities, showcasing advanced design and manufacturing techniques for complex hull structures [2]. Group 3: Applications and Impact - The AG600 serves as a multi-purpose aviation platform capable of operating in various terrains and fulfilling diverse roles such as firefighting, emergency rescue, and logistics support, thereby enhancing China's long-distance aerial rescue capabilities [3]. - The aircraft is designed to meet the needs of various disaster response scenarios, including forest fire control and emergency communication [3]. Group 4: Collaborative Development - The AG600 project involved collaboration across 22 provincial administrative regions, 296 enterprises, and 16 universities, establishing a "small core, large collaboration" model for development [4]. - This initiative has led to the creation of a comprehensive technical system for large amphibious aircraft, marking a historic leap in China's civil aviation industry, particularly in the field of specialized aircraft [4].

我们的新播客「Knock Knock 世界」昨天已经更新到第 10 期了， 一起来看看本周都更新了哪些内容。 如果你 还没来得及听节目的话，周末可以一次敲开三扇大门！ - 世界上最大的岛屿格陵兰岛，国土面积是中国的 1/4，人口却只有 5 万 7 千人。当地的交通主要靠雪橇或者 船只，这是为什么呢？ - 2021 年，一条新闻上了世界各地的头条：格陵兰岛的最高处，全年平均温度在零下 24 度以下的地方，下起 了大雨，零度以上的气温持续了 9 个小时。什么原因导致了这种极端天气？还会带来什么影响？ - 冰化了，山路浮现，燃油车可以派上用场了，越来越多的人不再养狗。被裁掉的狗怎么办呢？ - 没有坚冰的阻碍，开采格陵兰岛地底丰富的矿产也变得容易。这里到底藏了哪些让特朗普觊觎的矿产呢？ - 冰变成了水，原来寸步难行的北极航道变得好走了。也就是说，去格陵兰岛采矿、以及把矿产运出来，都变 得容易了。那么，格陵兰人欢迎这个可能为他们带来财富的变化吗？ - 即使你没听说过吉卜力，也一定见过他们的代表角色——龙猫。作为一家动画电影公司，吉卜力工作室在电 脑绘图占主流的时代里，仍然坚持以手绘为主，他们制作的《辉夜姬物语》，画片量 ...